Top 86 Slang For Stupid – Meaning & Usage

Sometimes, words just aren’t enough to describe the level of stupidity that we encounter in our daily lives. Luckily, we’ve got you covered with a list of slang terms for stupid that will have you laughing and shaking your head in disbelief. Whether you’re looking for a clever insult or just want to expand your vocabulary, this article has got it all. Get ready to have a good chuckle and discover some hilarious new ways to describe the less-than-intelligent individuals we come across.

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1. Dumb

This term is used to describe someone who lacks intelligence or makes poor decisions. It is often considered offensive and derogatory.

  • For example, “He made a dumb mistake and lost the game for his team.”
  • A person might say, “Don’t be dumb, it’s obvious that’s a scam.”
  • Someone might comment, “That was a dumb question, the answer is clearly stated in the instructions.”

2. Stupidhead

This term is a lighthearted way to call someone stupid or silly. It is often used among friends or in a joking manner.

  • For instance, “You’re such a stupidhead for forgetting your keys again.”
  • A person might tease, “Only a stupidhead would believe that ridiculous story.”
  • Someone might playfully say, “I can’t believe you fell for that prank, you’re such a stupidhead.”

3. Dimwit

This term is used to describe someone who is not very intelligent or lacks basic reasoning skills. It is often used in a derogatory manner.

  • For example, “He’s such a dimwit, he can never figure out simple math problems.”
  • A person might comment, “Don’t listen to him, he’s just a dimwit who doesn’t know what he’s talking about.”
  • Someone might say, “I can’t believe I have to explain this to you, you’re such a dimwit.”

4. Idiot

This term is used to insult someone by suggesting they are unintelligent or make consistently poor decisions.

  • For instance, “You’re such an idiot for believing that obvious lie.”
  • A person might say, “Stop acting like an idiot and think before you speak.”
  • Someone might comment, “Only an idiot would try to fix a broken computer without any knowledge of technology.”

5. Moron

This term is used to insult someone by suggesting they have a low level of intelligence or common sense.

  • For example, “She’s a complete moron for not realizing the consequences of her actions.”
  • A person might comment, “You’re such a moron, it’s amazing you can even tie your own shoes.”
  • Someone might say, “I can’t believe I have to explain this to you, you’re such a moron.”

6. Nitwit

A nitwit is someone who is considered foolish or unintelligent. It is often used in a playful or teasing manner.

  • For example, “Don’t be such a nitwit, it’s obvious that won’t work.”
  • A friend might jokingly say, “You’re such a nitwit, how did you manage to lose your keys again?”
  • In a lighthearted argument, someone might retort, “Only a nitwit would believe such a ridiculous claim.”

7. Blockhead

A blockhead is a term used to describe someone who is considered stupid or lacking in intelligence. It is often used in a light-hearted or playful manner.

  • For instance, “You’re such a blockhead, I can’t believe you fell for that trick.”
  • A friend might jokingly say, “Don’t be a blockhead, it’s obvious that won’t work.”
  • In a playful argument, someone might retort, “You’re just a blockhead if you think I’m going to believe that.”

8. Dolt

A dolt is an informal term used to describe someone who is considered foolish or stupid. It is often used in a light-hearted or teasing manner.

  • For example, “You’re such a dolt, I can’t believe you forgot your own birthday.”
  • A friend might jokingly say, “Don’t be a dolt, it’s obvious that won’t work.”
  • In a playful argument, someone might retort, “Only a dolt would believe such a ridiculous claim.”

9. Imbecile

An imbecile is a derogatory term used to describe someone who is considered extremely foolish or lacking in intelligence. It is often used in a more serious or harsh manner.

  • For instance, “He’s such an imbecile, he can’t even tie his own shoelaces.”
  • A frustrated person might say, “I can’t believe I have to work with a bunch of imbeciles.”
  • In a heated argument, someone might insultingly retort, “You’re just an imbecile who can’t comprehend basic logic.”

10. Ignoramus

An ignoramus is a term used to describe someone who is considered ignorant or lacking in knowledge. It is often used in a more formal or serious manner.

  • For example, “He’s such an ignoramus, he doesn’t even know the capital of his own country.”
  • A teacher might say, “I can’t believe I have to deal with a classroom full of ignoramuses.”
  • In a heated debate, someone might insultingly retort, “You’re just an ignoramus who refuses to educate yourself.”

11. Numpty

Numpty is a slang term used to describe someone who is foolish or stupid. It is commonly used in British English.

  • For example, “Don’t be such a numpty, it’s obvious how to solve this problem.”
  • In a lighthearted conversation, someone might playfully say, “I can’t believe I did that, I’m such a numpty.”
  • A person frustrated with someone’s lack of common sense might say, “He’s a complete numpty, he never understands anything.”

12. Knucklehead

Knucklehead is a slang term used to describe someone who is foolish or stupid. It is often used in a playful or affectionate manner.

  • For instance, “You knucklehead, I can’t believe you forgot your keys again.”
  • In a friendly conversation, someone might say, “I did something really silly yesterday, I felt like a knucklehead.”
  • A person teasing their friend might say, “You’re such a knucklehead, always getting into trouble.”

13. Airhead

Airhead is a slang term used to describe someone who is not very intelligent or lacks common sense. It is often used in a lighthearted or teasing manner.

  • For example, “She’s such an airhead, she can never remember anything.”
  • In a joking conversation, someone might say, “I had a total airhead moment and forgot my own name.”
  • A person frustrated with someone’s lack of understanding might say, “I can’t believe how much of an airhead he is, he never gets it.”

14. Bonehead

Bonehead is a slang term used to describe someone who is foolish or stupid. It is often used in a playful or affectionate manner.

  • For instance, “You bonehead, why did you do that?”
  • In a friendly conversation, someone might say, “I did something really dumb, I felt like a bonehead.”
  • A person teasing their friend might say, “You’re such a bonehead, always making silly mistakes.”

15. Thickhead

Thickhead is a slang term used to describe someone who is foolish or stupid. It is often used in a lighthearted or teasing manner.

  • For example, “He’s such a thickhead, he never understands anything.”
  • In a joking conversation, someone might say, “I had a total thickhead moment and couldn’t figure out how to open the door.”
  • A person frustrated with someone’s lack of common sense might say, “I can’t believe how much of a thickhead he is, he never gets it.”

16. Doofus

A doofus is an informal term used to describe someone who is silly, foolish, or lacking in intelligence. It is often used in a playful or lighthearted manner.

  • For example, “Don’t be such a doofus, it was just a joke.”
  • If someone does something clumsy, you might say, “Oops, you really pulled a doofus move there.”
  • When someone makes a silly mistake, you could tease them by saying, “Wow, you’re such a doofus sometimes.”

17. Lamebrain

A lamebrain is a derogatory term used to describe someone who is unintelligent or slow-witted. It implies a lack of common sense or intellectual capacity.

  • For instance, “Only a lamebrain would believe such a ridiculous rumor.”
  • If someone makes a foolish decision, you might say, “What were you thinking, you lamebrain?”
  • When someone struggles to understand a simple concept, you could say, “Come on, don’t be such a lamebrain, it’s not that difficult.”

18. Chump

A chump is a slang term used to describe someone who is easily fooled, gullible, or easily taken advantage of. It suggests a lack of intelligence or awareness.

  • For example, “Don’t be a chump and fall for that scam.”
  • If someone gets tricked or conned, you might say, “Looks like you’re the chump in this situation.”
  • When someone makes a naive or foolish decision, you could mockingly say, “Congratulations, you just proved yourself to be a real chump.”

19. Simpleton

A simpleton is a derogatory term used to describe someone who is lacking in intelligence or common sense. It suggests a person who is foolish or naive.

  • For instance, “He’s such a simpleton, always falling for the same tricks.”
  • If someone struggles to understand a basic concept, you might say, “You’re acting like a complete simpleton right now.”
  • When someone makes a silly mistake, you could say, “Well, that was a simpleton move if I’ve ever seen one.”

20. Halfwit

A halfwit is an informal term used to describe someone who is lacking in intelligence or mental capacity. It implies a person who is not very smart or clever.

  • For example, “I can’t believe I have to work with that halfwit.”
  • If someone says or does something foolish, you might say, “What a halfwit, can’t believe they actually thought that.”
  • When someone struggles to grasp a simple idea, you could sarcastically say, “Wow, you’re a real halfwit, aren’t you?”

21. Dunderhead

This is a derogatory term used to describe someone who is foolish or unintelligent. It suggests that the person has a lack of common sense or is generally slow-witted.

  • For example, “He forgot his keys again? What a dunderhead.”
  • In a group project, someone might say, “Don’t rely on him, he’s a dunderhead.”
  • A frustrated parent might exclaim, “How did you manage to spill juice all over the floor? You’re such a dunderhead!”

22. Numbskull

This slang term is used to refer to someone who is stupid or lacking intelligence. It implies that the person has a dull or numb skull, suggesting a lack of mental capacity.

  • For instance, “He couldn’t even solve a simple math problem. What a numbskull.”
  • In a teasing manner, friends might say, “You’re such a numbskull for forgetting your own birthday.”
  • A teacher might scold a student by saying, “Pay attention, you numbskull!”

23. Bozo

Bozo is a slang term used to describe someone who is foolish or acts in a silly or ridiculous manner. It is often used to mock or make fun of someone’s lack of intelligence.

  • For example, “He tried to fix the computer but only made it worse. What a bozo.”
  • Friends might playfully tease each other by saying, “You’re such a bozo for tripping over your own feet.”
  • A comedian might use the term to refer to themselves, saying, “I’m just a bozo trying to make people laugh.”

24. Knobhead

Knobhead is a derogatory slang term used to insult someone by suggesting that they have a head shaped like a doorknob, implying stupidity or foolishness.

  • For instance, “He couldn’t even follow simple instructions. What a knobhead.”
  • In a heated argument, someone might angrily say, “You’re such a knobhead for not understanding the situation.”
  • A frustrated coworker might mutter, “I can’t believe I have to work with that knobhead.”

25. Muttonhead

Muttonhead is a slang term used to describe someone who is foolish or lacking intelligence. The term compares the person’s brain to the head of a sheep, suggesting a lack of mental capacity.

  • For example, “He keeps making the same mistakes over and over. What a muttonhead.”
  • Friends might playfully tease each other by saying, “You’re such a muttonhead for forgetting your own phone number.”
  • A teacher might scold a student by saying, “Stop daydreaming, you muttonhead!”

26. Thicko

Thicko is a slang term used to describe someone who is not very intelligent or lacks common sense.

  • For example, “He’s such a thicko, he can’t even tie his own shoelaces.”
  • When discussing someone’s poor decision-making, you might say, “Only a thicko would believe that.”
  • A frustrated teacher might say, “I can’t believe I have to explain this to a bunch of thickos.”

27. Dipstick

Dipstick is a slang term used to refer to someone who is foolish or stupid.

  • For instance, “Don’t be such a dipstick, it’s obvious how this works.”
  • When someone does something careless, you might say, “You really pulled a dipstick move there.”
  • In a lighthearted argument between friends, one might jokingly say, “You’re such a dipstick, but I love you anyway.”

28. Dope

Dope is a slang term used to describe someone who is unintelligent or foolish.

  • For example, “He’s such a dope, he can’t even solve a simple math problem.”
  • When someone makes a silly mistake, you might say, “What a dope, how did they manage to do that?”
  • If someone falls for a prank or trick, you might playfully call them a dope.
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29. Dingleberry

Dingleberry is a slang term used to refer to someone who is foolish or stupid.

  • For instance, “Stop acting like a dingleberry and think before you speak.”
  • When someone does something clumsy or makes a mistake, you might say, “Nice job, dingleberry.”
  • In a playful argument, one might jokingly say, “You’re such a dingleberry, but that’s why I love you.”

30. Schmuck

Schmuck is a slang term used to describe someone who is foolish or stupid.

  • For example, “He’s such a schmuck, he can’t even follow simple instructions.”
  • When someone makes a dumb comment, you might say, “What a schmuck, they have no idea what they’re talking about.”
  • If someone falls for a prank or is easily fooled, you might call them a schmuck.

31. Yokel

This term is often used to describe someone who is from a rural or small-town background and is seen as lacking intelligence or sophistication.

  • For example, “Don’t mind him, he’s just a yokel who doesn’t know any better.”
  • In a conversation about someone’s behavior, one might say, “He acted like a complete yokel at the party last night.”
  • When talking about someone’s lack of knowledge, a person might comment, “He’s such a yokel, he didn’t even know who the president is.”

32. Dweeb

This term is used to describe someone who is perceived as socially inept, awkward, or foolish. It often implies a lack of coolness or social skills.

  • For instance, “He’s such a dweeb, he can’t even hold a conversation.”
  • When teasing a friend about their interests, one might say, “You’re such a dweeb for being so into comic books.”
  • In a discussion about someone’s behavior, a person might comment, “He acted like a total dweeb when he spilled his drink all over himself.”

33. Nimrod

This term is used to describe someone who is considered to be foolish, clumsy, or lacking intelligence. It is often used sarcastically or humorously.

  • For example, “Look at that nimrod trying to parallel park.”
  • When teasing a friend about a mistake, one might say, “Nice job, nimrod.”
  • In a conversation about someone’s intelligence, a person might comment, “He’s a complete nimrod if he thinks that’s the right answer.”

34. Dim-witted

This term is used to describe someone who is perceived as having a lower level of intelligence or being slow to understand things.

  • For instance, “He’s so dim-witted, it takes him forever to grasp simple concepts.”
  • When discussing someone’s mistake, one might say, “That was a dim-witted move.”
  • In a conversation about a coworker’s intelligence, a person might comment, “I can’t believe how dim-witted he is, he can’t even follow basic instructions.”

35. Thick-headed

This term is used to describe someone who is seen as stubborn or slow to understand ideas or concepts.

  • For example, “He’s so thick-headed, he never listens to other people’s opinions.”
  • When discussing someone’s lack of understanding, one might say, “He’s too thick-headed to see the truth.”
  • In a conversation about a friend’s stubbornness, a person might comment, “He’s so thick-headed, he won’t admit when he’s wrong.”

36. Airheaded

This term is used to describe someone who is foolish or unintelligent. It implies that the person is not very bright or has a tendency to make silly mistakes.

  • For example, “She forgot her keys for the third time this week. She can be so airheaded.”
  • Someone might say, “I can’t believe he fell for that obvious prank. He’s so airheaded.”
  • Another usage could be, “She made such an airheaded comment during the meeting, it was embarrassing.”

37. Boneheaded

This slang term is used to describe someone who is incredibly foolish or lacking in common sense. It suggests that the person’s actions or decisions are incredibly dumb or ill-advised.

  • For instance, “He made a boneheaded move by quitting his job without having another one lined up.”
  • Someone might say, “I can’t believe she forgot her own birthday. That’s just boneheaded.”
  • Another usage could be, “His boneheaded mistake cost the team the game.”

38. Dopey

This term is used to describe someone who is silly, foolish, or slow-witted. It suggests that the person is not very intelligent or tends to act in a clumsy or awkward manner.

  • For example, “He has a dopey grin on his face whenever he’s happy.”
  • Someone might say, “She always comes up with these dopey ideas that never work.”
  • Another usage could be, “He’s acting all dopey because he stayed up all night studying.”

39. Dorky

This slang term is used to describe someone who is socially awkward, unfashionable, or overly studious. It suggests that the person lacks coolness or style and may have interests or behaviors that are considered nerdy or geeky.

  • For instance, “He’s wearing those dorky suspenders again.”
  • Someone might say, “She’s always making dorky jokes that no one understands.”
  • Another usage could be, “He’s a bit dorky, but he’s really smart.”

40. Knuckleheaded

This term is used to describe someone who is incredibly foolish or lacking in common sense. It suggests that the person’s actions or decisions are incredibly dumb or ill-advised.

  • For example, “He made a knuckleheaded mistake by leaving the stove on.”
  • Someone might say, “I can’t believe she fell for that obvious scam. She’s so knuckleheaded.”
  • Another usage could be, “His knuckleheaded behavior always gets him into trouble.”

41. Lunkheaded

This term refers to someone who is extremely stupid or lacking in intelligence. It is often used to describe someone who consistently makes foolish or nonsensical decisions.

  • For example, “He made such a lunkheaded mistake by forgetting to turn off the stove.”
  • In a discussion about a person’s poor judgment, one might say, “His lunkheaded choices landed him in a lot of trouble.”
  • A frustrated teacher might comment, “I can’t believe how lunkheaded some of my students can be.”

42. Birdbrained

This slang term describes someone who is not very intelligent or lacks common sense. It suggests that the person’s brain is as small and simple as that of a bird.

  • For instance, “She always forgets important details. She’s so birdbrained.”
  • In a conversation about someone’s forgetfulness, one might say, “I can’t rely on him to remember anything. He’s too birdbrained.”
  • A person jokingly commenting on their own absent-mindedness might say, “I must have a birdbrained moment because I can’t find my keys anywhere.”

43. Boobish

This term is used to describe someone who is foolish, silly, or lacking in common sense. It suggests that the person’s actions or behavior are unintelligent or ridiculous.

  • For example, “He made a boobish mistake by trying to fix the car without any knowledge of mechanics.”
  • In a discussion about someone’s poor decision-making, one might say, “Her boobish choices always lead to negative consequences.”
  • A person teasing a friend about their silly behavior might comment, “You’re acting so boobish today, what’s gotten into you?”

44. Half-baked

This slang term refers to something that is incomplete or poorly planned. It can also be used to describe someone’s ideas or actions that lack proper consideration or preparation.

  • For instance, “His half-baked plan to start a business without any experience is bound to fail.”
  • In a conversation about a rushed project, one might say, “The report was so half-baked, it didn’t cover all the necessary information.”
  • A person criticizing a poorly executed idea might comment, “That proposal is completely half-baked. It needs more research and planning.”

45. Balmy

In this context, “balmy” is used as a slang term to describe someone who is crazy or mentally unstable. It suggests that the person’s behavior or thoughts are irrational or nonsensical.

  • For example, “He went balmy and started shouting at imaginary people.”
  • In a discussion about someone’s erratic behavior, one might say, “Her actions have become increasingly balmy lately.”
  • A person jokingly commenting on their own eccentricity might say, “Sometimes I feel like I’m a little balmy, but that’s what makes life interesting.”

46. Kooky

This term refers to someone who is a bit strange or odd in their behavior or appearance. It is often used in a lighthearted or playful manner.

  • For example, “She’s always coming up with kooky ideas that no one else understands.”
  • In a comedy movie, a character might be described as “a kooky sidekick.”
  • A friend might say, “You’re looking kooky with that wild hairstyle!”

47. Wacky

This word describes something or someone that is strange, unconventional, or outlandish in a humorous or amusing way.

  • For instance, “He has a wacky sense of humor that always keeps us laughing.”
  • A person might describe a bizarre invention as “a wacky contraption.”
  • A friend might say, “Let’s do something wacky and spontaneous tonight!”

48. Sappy

This term is used to describe something, such as a movie or a person’s behavior, that is excessively sentimental or emotional in a way that may be seen as cheesy or overly sweet.

  • For example, “That romantic comedy was so sappy, I couldn’t help but roll my eyes.”
  • A person might describe a love song as “too sappy for their taste.”
  • A friend might say, “Don’t get all sappy on me now, we’re just saying goodbye for a week!”

49. Dotty

This word is used to describe someone who is slightly mad or eccentric in their behavior or thinking. It is often used in a light-hearted or affectionate way.

  • For instance, “My grandmother is a bit dotty, but we love her eccentricities.”
  • A person might describe a quirky professor as “a bit dotty.”
  • A friend might say, “You’re acting dotty today, what’s gotten into you?”

50. Crackpot

This term is used to describe someone who is considered to be crazy, eccentric, or holding unconventional or strange beliefs. It is often used in a derogatory or dismissive manner.

  • For example, “He’s always coming up with crackpot theories that no one takes seriously.”
  • A person might describe a conspiracy theorist as “a crackpot.”
  • A friend might say, “Don’t listen to him, he’s just a crackpot with wild ideas.”

51. Screwball

This term refers to someone who is considered strange or odd in their behavior or thinking.

  • For example, “He’s a real screwball, always coming up with bizarre ideas.”
  • In a comedy movie, a character might be described as “a lovable screwball.”
  • Someone might say, “Don’t listen to him, he’s just a screwball.”

52. Cockeyed

This word can be used to describe someone whose eyes are not aligned properly, but it is also used metaphorically to mean foolish or absurd.

  • For instance, “He gave me a cockeyed look when I told him the news.”
  • In a humorous conversation, someone might say, “That’s a cockeyed idea if I’ve ever heard one.”
  • A person might describe a situation as “a cockeyed mess.”
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53. Looney

This slang term is derived from the character “Bugs Bunny” from Looney Tunes, who is known for his eccentric and unpredictable behavior.

  • For example, “He’s acting like a looney, talking to himself.”
  • In a discussion about mental health, someone might say, “We need to provide better support for people who are looney.”
  • A person might describe a chaotic situation as “looney tunes.”

54. Nutty

This term is used to describe someone who is considered crazy or eccentric in their behavior or thinking.

  • For instance, “She’s a bit nutty, always coming up with wild ideas.”
  • In a lighthearted conversation, someone might say, “You’re nutty as a fruitcake!”
  • A person might describe a funny or absurd situation as “nutty.”

55. Harebrained

This word describes someone who has foolish or impractical ideas or plans.

  • For example, “His harebrained scheme to make money quickly ended in disaster.”
  • In a discussion about decision-making, someone might say, “Let’s not make any harebrained decisions.”
  • A person might describe a risky or ill-advised action as “harebrained.”

56. Zany

Zany is a term used to describe someone who is wild, wacky, or unpredictable. It is often used to refer to someone who behaves in an unconventional or outlandish manner.

  • For example, “He’s always coming up with zany ideas that no one else would think of.”
  • A person might say, “I love her zany sense of humor. She always keeps me entertained.”
  • In a comedy show, a character might be described as “the zany sidekick who brings the laughs.”

57. Dumbass

Dumbass is a derogatory term used to insult someone’s intelligence or lack thereof. It is a combination of the words “dumb” and “ass” and is often used in a playful or lighthearted manner, though it can also be used as an offensive insult.

  • For instance, “He’s such a dumbass for forgetting his keys again.”
  • In a joking manner, a person might say, “I can’t believe I did that. What a dumbass I am.”
  • A friend might playfully tease another by saying, “You’re such a dumbass sometimes, but that’s why I love you.”

58. Numskull

Numskull is a term used to describe someone who is thought to be foolish, stupid, or lacking in intelligence. It is a playful or lighthearted way to refer to someone’s lack of smarts.

  • For example, “He’s a real numskull for thinking he could get away with that.”
  • A person might say, “I can’t believe I forgot my own birthday. What a numskull I am.”
  • In a comedy movie, a character might be described as “the lovable numskull who always messes things up.”

59. Dunce

Dunce is a term used to describe someone who is perceived to be slow-witted, foolish, or lacking in intelligence. It is often used to mock or belittle someone’s intellectual abilities.

  • For instance, “He’s always making mistakes. What a dunce.”
  • A person might say, “I can’t believe I failed that easy test. I feel like a dunce.”
  • In a school setting, a teacher might refer to a struggling student as “the class dunce.”

60. Blockbrain

Blockbrain is a slang term used to describe someone who is considered to be extremely stupid or unintelligent. It is a more severe and derogatory term than some of the other slang words for stupid.

  • For example, “He’s a real blockbrain for not understanding such a simple concept.”
  • A person might say, “I can’t believe I locked myself out of the house again. I’m such a blockbrain.”
  • In a heated argument, one person might insult another by calling them a “blockbrain.”

61. Knuckle-dragger

This term is used to describe someone who is incredibly stupid or unintelligent. It implies that the person is so dumb that they are comparable to a primitive human who still walks on their knuckles.

  • For example, “Don’t bother asking him for help, he’s a complete knuckle-dragger.”
  • In a discussion about intelligence, someone might say, “I can’t stand working with knuckle-draggers who can’t comprehend simple instructions.”
  • Another might comment, “It’s unbelievable how some people can be such knuckle-draggers.”

62. Pea-brain

This term refers to someone who has a very small brain or limited intelligence. It implies that the person is incapable of complex or critical thinking.

  • For instance, “He’s such a pea-brain, he can’t even solve basic math problems.”
  • In a conversation about someone’s lack of understanding, one might say, “It’s like talking to a pea-brain, they just don’t get it.”
  • Another might comment, “I can’t believe I have to explain this to you, you pea-brain.”

63. Lunkhead

This term is used to describe someone who is foolish or stupid. It implies that the person is slow-witted or lacking common sense.

  • For example, “He’s always making dumb mistakes, what a lunkhead.”
  • In a discussion about someone’s poor decision-making, one might say, “Only a lunkhead would think that’s a good idea.”
  • Another might comment, “I can’t believe I have to work with such lunkheads.”

64. Twit

This term refers to someone who is regarded as silly or foolish. It implies that the person is not very intelligent or lacks common sense.

  • For instance, “Stop acting like a twit and start taking things seriously.”
  • In a conversation about someone’s ridiculous behavior, one might say, “I can’t believe that twit thought that was a good idea.”
  • Another might comment, “Don’t pay attention to him, he’s just a twit.”

65. Dumbbell

This term is used to describe someone who is stupid or lacks intelligence. It implies that the person is not very bright or has a low level of intellectual capacity.

  • For example, “He’s such a dumbbell, he can’t even remember his own phone number.”
  • In a discussion about someone’s lack of understanding, one might say, “I can’t believe I have to explain this to you, you dumbbell.”
  • Another might comment, “Don’t listen to him, he’s just a dumbbell.”

66. Nincompoop

Nincompoop is a playful and lighthearted term used to describe someone who is foolish or unintelligent. It is often used in a humorous or affectionate way.

  • For example, “Don’t be such a nincompoop, it’s obvious that’s not how you tie your shoes.”
  • A parent might say to their child, “You’re such a little nincompoop sometimes, but I love you.”
  • In a joking manner, a friend might say, “Only a nincompoop would think that’s a good idea.”

67. Klutz

Klutz is a slang term used to describe someone who is clumsy or accident-prone. It is often used in a light-hearted or teasing manner.

  • For instance, “Watch out, here comes the klutz!”
  • A person might say, “I spilled my coffee again, I’m such a klutz.”
  • In a joking manner, a friend might say, “You’re such a klutz, how did you manage to trip over your own feet?”

68. Oaf

Oaf is a derogatory term used to describe someone who is clumsy, awkward, or stupid. It is often used to insult or mock someone’s intelligence or actions.

  • For example, “You’re such an oaf, you can’t even tie your own shoelaces.”
  • A person might say, “He’s such an oaf, he knocked over the entire display.”
  • In a heated argument, someone might say, “Why am I even arguing with an oaf like you?”

69. Pinhead

Pinhead is a derogatory term used to describe someone who is foolish, stupid, or lacking intelligence. It is often used as an insult or to belittle someone.

  • For instance, “Don’t listen to him, he’s just a pinhead.”
  • A person might say, “I can’t believe I was dating that pinhead.”
  • In a heated argument, someone might say, “You’re such a pinhead, you can’t even understand a simple concept.”

70. Dingbat

Dingbat is a playful and light-hearted term used to describe someone who is foolish or stupid. It is often used in a joking or affectionate manner.

  • For example, “You’re such a dingbat, but that’s why I love you.”
  • A person might say, “I forgot my keys again, I’m such a dingbat.”
  • In a teasing manner, a friend might say, “Only a dingbat would believe that ridiculous story.”

71. Lummox

This term is used to describe someone who is not very intelligent or coordinated. It can be used playfully or as an insult.

  • For example, “He’s such a lummox, always tripping over his own feet.”
  • A person might say, “I can’t believe I did something so lummox-like.”
  • Another might comment, “Don’t be such a lummox, use your brain!”

72. Putz

This word is used to describe someone who is considered foolish or stupid. It can be used in a lighthearted or derogatory manner.

  • For instance, “He’s acting like such a putz, he can’t even tie his own shoes.”
  • A person might say, “I can’t believe I did something so putz-like.”
  • Another might comment, “Quit being a putz and pay attention!”

73. Berk

This slang term is used to describe someone who is considered foolish or stupid. It is commonly used in British English.

  • For example, “Stop being such a berk and think before you speak.”
  • A person might say, “I feel like a berk for forgetting my keys.”
  • Another might comment, “Don’t act like a berk, use your common sense!”

74. BYU or Back Yard University

This term is used to mockingly refer to someone who is seen as lacking intelligence or education. It suggests that the person did not attend a formal university and instead learned everything in their own backyard.

  • For instance, “He thinks he knows everything, but he’s just a product of BYU.”
  • A person might say, “Don’t listen to him, he’s a Back Yard University graduate.”
  • Another might comment, “Only someone from BYU would believe something so ridiculous.”

75. Daft

This term is used to describe someone who is considered silly, foolish, or lacking common sense. It can be used playfully or as an insult.

  • For example, “He’s acting daft, he doesn’t even realize how ridiculous he looks.”
  • A person might say, “I feel so daft for forgetting my own birthday.”
  • Another might comment, “Don’t be daft, think before you speak!”

76. Donkey

This term is used to describe someone who is foolish or unintelligent. It is often used in a playful or lighthearted manner.

  • For example, “Stop acting like a donkey and use your common sense!”
  • A person might say, “I can’t believe I forgot my keys again. I’m such a donkey.”
  • In a joking conversation, one might tease, “Did you really think that was a good idea? You’re such a donkey!”

77. Eat Paint Chips As A Kid

This phrase is a humorous way of saying someone is not very intelligent. It implies that the person may have done something as a child that affected their mental capacity.

  • For instance, if someone makes a silly mistake, you might say, “Did you eat paint chips as a kid?”
  • In a conversation about someone’s questionable decision-making, one might comment, “They must have eaten a lot of paint chips as a kid.”
  • A person might self-deprecatingly say, “Sometimes I feel like I ate too many paint chips as a kid.”

78. Jerk

This term is used to describe someone who is rude, inconsiderate, or obnoxious. It can be used to refer to someone’s behavior or personality.

  • For example, “He cut in line and didn’t apologize. What a jerk!”
  • In a conversation about a difficult coworker, one might say, “I can’t stand working with that jerk.”
  • A person might vent, “I can’t believe she said that to me. What a jerk!”

79. Lunching

This term is used to describe someone who is acting in a foolish or irrational manner. It is often used in a lighthearted or playful way.

  • For instance, if someone is doing something silly, you might say, “Why are you lunching?”
  • In a conversation about a friend’s eccentric behavior, one might comment, “They’re always lunching.”
  • A person might playfully say, “I must be lunching to think that would work.”

80. Numb As A Hake

This phrase is used to describe someone who is incredibly foolish or unintelligent. It implies a lack of awareness or understanding.

  • For example, “He couldn’t figure out how to open the door. He’s as numb as a hake!”
  • In a conversation about someone’s poor decision-making, one might say, “They’re as numb as a hake.”
  • A person might self-deprecatingly comment, “I can’t believe I forgot my own birthday. I’m numb as a hake.”

81. Plonker

This term is used to describe someone who is foolish or stupid. It is often used in a light-hearted or playful manner.

  • For example, “He forgot his own birthday? What a plonker!”
  • In a joking conversation, one might say, “I can’t believe I locked myself out of the house again. I’m such a plonker.”
  • A person might describe someone’s mistake by saying, “He spilled coffee all over his laptop. What a plonker move!”

82. Prat

This word is a derogatory term used to describe someone who is foolish, idiotic, or incompetent. It is often used in a more insulting or critical manner.

  • For instance, “He tripped over his own shoelaces? What a prat!”
  • In a heated argument, one might say, “You’re acting like a complete prat right now.”
  • A person might criticize someone’s decision by saying, “Giving him the responsibility was a prat move.”

83. Prick

This term is a vulgar and offensive slang used to insult or belittle someone who is considered stupid or foolish. It is a more intense and derogatory term.

  • For example, “He can’t even tie his own shoes? What a prick!”
  • In a heated argument, one might say, “You’re nothing but a stupid prick.”
  • A person might express frustration by saying, “I can’t believe I have to work with that prick.”

84. Sharp As A Marble

This phrase is used sarcastically to describe someone who is incredibly stupid or lacking intelligence. It emphasizes the person’s lack of intellectual capability.

  • For instance, “He couldn’t even solve a simple math problem. He’s as sharp as a marble.”
  • In a joking conversation, one might say, “I tried to explain it to him, but he’s as sharp as a marble.”
  • A person might describe someone’s decision by saying, “Choosing to wear flip-flops in the snow? That’s sharp as a marble.”

85. Slow

This word is used to describe someone who is mentally slow or lacking intelligence. It suggests a person’s inability to comprehend or understand things quickly.

  • For example, “He still doesn’t get the joke? He’s so slow!”
  • In a teasing conversation, one might say, “You’re acting slow today. Did you get enough sleep?”
  • A person might express frustration by saying, “I can’t work with him. He’s too slow to keep up.”

86. Thick

This term is used to describe someone who lacks intelligence or common sense. It implies that the person’s mind is “thick” or slow to understand.

  • For example, “He’s so thick, he can’t even tie his own shoelaces.”
  • In a conversation about a person’s foolish actions, someone might say, “She did the most thick thing yesterday.”
  • Another person might comment, “I can’t believe how thick he is, it’s like he never learns.”