Top 53 Slang For Stupid – Meaning & Usage

Sometimes, words fail to capture the essence of certain situations or individuals. That’s where slang comes in. In this listicle, we’ve gathered the top slang terms for “stupid” that will have you laughing and shaking your head in disbelief. Whether you’re looking for a lighthearted way to describe someone’s lack of intelligence or simply want to expand your vocabulary, we’ve got you covered. So sit back, relax, and prepare to be entertained by the creative ways people have found to express their exasperation.

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1. Jerk

This term is used to describe someone who is rude, obnoxious, or unpleasant. It can also refer to someone who behaves in a selfish or inconsiderate manner.

For example, “Don’t be such a jerk and let someone else have a turn.”
Someone might say, “He’s always acting like a jerk and making fun of people.”
In a disagreement, one person might accuse the other of being a jerk by saying, “You’re just being a jerk because you don’t agree with me.”

2. Karen

This slang term is often used to describe a specific type of person who is perceived as entitled, demanding, and often complains to managers or authorities about trivial matters.

For instance, “She asked to speak to the manager and complained about the service. Total Karen move.”
In a discussion about difficult customers, someone might say, “I had a Karen come into my store today and cause a scene over a minor issue.”
Another person might say, “Karen is always causing drama and making everyone’s life difficult.”

3. Loser

This word is used to describe someone who is considered to be unsuccessful, uncool, or generally undesirable.

For example, “He’s such a loser, he can’t even hold down a job.”
In a conversation about dating, someone might say, “I went on a date with this guy, but he turned out to be a total loser.”
Another person might use the term to describe themselves, saying, “I feel like a loser because I keep making the same mistakes.”

4. Dumbass

This term is a combination of “dumb” and “ass” and is used to describe someone who is considered to be very stupid or foolish.

For instance, “He’s always saying the dumbest things. What a dumbass.”
In a playful argument between friends, someone might say, “You’re such a dumbass, you forgot your own birthday.”
Another person might use the term to express frustration, saying, “I can’t believe I made such a dumbass mistake.”

5. Idiot

This word is used to describe someone who is considered to be very stupid, foolish, or lacking in common sense.

For example, “He’s an idiot for trying to fix his car without any knowledge of mechanics.”
In a discussion about a person’s actions, someone might say, “Only an idiot would jump off a moving train.”
Another person might use the term to express annoyance, saying, “I can’t believe I forgot my keys again. I’m such an idiot.”

6. Moron

A derogatory term used to describe someone who is considered extremely foolish or lacking intelligence. It is often used to insult someone’s intelligence.

For example, “He forgot his own birthday? What a moron.”
In a heated argument, someone might say, “You’re such a moron, you can’t even understand a simple concept.”
A frustrated teacher might say, “I can’t believe how many morons are in this class.”

7. Dimwit

A term used to describe someone who is perceived as being foolish or lacking common sense. It is often used in a light-hearted or playful manner.

For instance, “He tried to put the car keys in the refrigerator. What a dimwit.”
In a joking manner, someone might say, “I’m such a dimwit, I locked myself out of the house again.”
A friend might tease, “You’re such a dimwit, it’s a wonder you can even tie your own shoes.”

8. Nitwit

A term used to describe someone who is seen as foolish or lacking intelligence. It is often used in a playful or affectionate manner.

For example, “She couldn’t figure out how to turn on the TV. What a nitwit.”
In a lighthearted conversation, someone might say, “I’m such a nitwit, I always forget where I put my keys.”
A sibling might playfully tease, “You’re such a nitwit, it’s a wonder you can even dress yourself.”

9. Blockhead

A term used to describe someone who is perceived as being stupid or slow-witted. It is often used in a playful or teasing manner.

For instance, “He couldn’t solve a simple math problem. What a blockhead.”
In a joking manner, someone might say, “I’m such a blockhead, I locked my keys in the car again.”
A friend might playfully tease, “You’re such a blockhead, it’s a wonder you can even tie your own shoelaces.”

10. Knucklehead

A term used to describe someone who is seen as foolish or lacking intelligence. It is often used in a playful or affectionate manner.

For example, “He tripped over his own feet. What a knucklehead.”
In a lighthearted conversation, someone might say, “I’m such a knucklehead, I always forget where I parked my car.”
A sibling might playfully tease, “You’re such a knucklehead, it’s a wonder you can even find your way home.”

11. Numskull

This term is used to describe someone who is foolish or lacking in intelligence. It is often used playfully or affectionately.

For example, “Don’t be such a numskull, it was just a joke.”
A parent might scold their child, “You numskull, why would you touch a hot stove?”
Someone might jokingly say, “I can’t believe I locked my keys in the car again, I’m such a numskull.”

12. Dolt

A dolt is someone who is perceived as stupid or unintelligent. It is a more derogatory term than “numskull” and is often used to express frustration or annoyance.

For instance, “I can’t believe you forgot your own birthday, you dolt.”
A teacher might say to a student, “Stop acting like a dolt and pay attention.”
One might exclaim, “What a dolt! How could he not see that coming?”

13. Simpleton

A simpleton is someone who is considered to be lacking in common sense or intelligence. It is a somewhat old-fashioned term and is often used to describe someone in a condescending manner.

For example, “He’s such a simpleton, he can’t even tie his own shoes.”
A character in a book might be described as a simpleton, “The simpleton of the village always made everyone laugh.”
One might say, “I can’t believe I fell for that scam, I feel like a total simpleton.”

14. Bonehead

A bonehead is someone who is seen as foolish or lacking intelligence. It is a more lighthearted term and is often used in a playful or teasing manner.

For instance, “You bonehead, you left the keys in the car again.”
Friends might laugh and say, “What a bonehead move, tripping over your own feet.”
One might playfully say, “I can’t believe I forgot my own name, I’m such a bonehead.”

15. Chump

A chump is someone who is easily fooled or taken advantage of. It is often used to describe someone who is naive or gullible.

For example, “Don’t be a chump and fall for their tricks.”
A person might say, “I feel like such a chump for believing their lies.”
One might warn, “Don’t be a chump and lend them money, they’ll never pay you back.”

16. Nincompoop

Nincompoop is a derogatory term used to describe a person who is foolish or lacking in intelligence. It is often used in a playful or humorous manner.

For example, “Don’t be such a nincompoop and read the instructions before assembling the furniture.”
A person might say, “I can’t believe I locked myself out of the car. I feel like a total nincompoop.”
In a lighthearted argument, someone might jokingly say, “Only a nincompoop would think that’s a good idea.”

17. Pinhead

Pinhead is a slang term used to describe someone who is narrow-minded or lacking in intelligence. It implies that the person has a small brain, similar to the size of a pinhead.

For instance, “I can’t believe he still believes in conspiracy theories. What a pinhead.”
A person might say, “Don’t listen to him, he’s just a pinhead who can’t see the bigger picture.”
In a discussion about politics, someone might dismissively say, “Those pinheads in Congress can’t seem to agree on anything.”

18. Thickhead

Thickhead is a slang term used to describe someone who is slow-witted or lacking in intelligence. It suggests that the person’s brain is thick or dense, making it difficult for them to understand or comprehend things.

For example, “I’ve explained it to him multiple times, but he’s such a thickhead.”
A person might say, “You don’t have to be a genius to figure it out. Even a thickhead like him should understand.”
In a joking manner, someone might say, “I may be a bit of a thickhead, but at least I’m good-looking.”

19. Twit

Twit is a slang term used to describe someone who is foolish, silly, or lacking in common sense. It is often used in a lighthearted or teasing manner.

For instance, “Stop acting like a twit and think before you speak.”
A person might say, “I can’t believe I did something so twit-like.”
In a playful argument, someone might say, “You’re such a twit if you think that’s true.”

20. Yokel

Yokel is a slang term used to describe someone who is unsophisticated, ignorant, or lacking in worldly knowledge. It is often used to refer to someone from a rural or small-town background.

For example, “He may be a yokel, but he’s got a heart of gold.”
A person might say, “Don’t mind his yokel manners, he means well.”
In a discussion about cultural differences, someone might say, “City folks often underestimate the intelligence of yokels.”

21. Dunderhead

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

For example, “Don’t be such a dunderhead and double-check your work.”
A friend might jokingly say, “You forgot your keys again? You’re such a dunderhead.”
In a funny conversation, someone might exclaim, “I can’t believe I just did that. I’m such a dunderhead!”

22. Dope

This word is used to describe someone who is not very smart or is acting in a foolish manner. It can also refer to someone who is under the influence of drugs.

For instance, “He’s always making dumb mistakes. What a dope!”
A person might say, “I can’t believe I fell for that scam. I feel like such a dope.”
In a conversation about someone’s behavior, one might comment, “She’s acting like a total dope.”

23. Muttonhead

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

For example, “He’s always saying the silliest things. What a muttonhead!”
A friend might jokingly say, “You locked yourself out of the car again? You’re such a muttonhead.”
In a lighthearted conversation, someone might exclaim, “I can’t believe I forgot my own birthday. I’m such a muttonhead!”

24. Numbskull

This word is used to describe someone who is not very intelligent or lacks common sense. It is often used in a playful or teasing manner.

For instance, “She’s always making silly mistakes. What a numbskull!”
A person might say, “I can’t believe I fell for that obvious lie. I feel like such a numbskull.”
In a conversation about someone’s behavior, one might comment, “He’s acting like a total numbskull.”

25. Pea-brain

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

For example, “He’s always forgetting the simplest things. What a pea-brain!”
A friend might jokingly say, “You can’t figure out how to use a smartphone? You’re such a pea-brain.”
In a lighthearted conversation, someone might exclaim, “I can’t believe I put salt instead of sugar in my coffee. I’m such a pea-brain!”

26. Simple-minded

This term is used to describe someone who is not very smart or has limited mental abilities.

For example, “He’s so simple-minded, he can’t even tie his own shoelaces.”
In a discussion about problem-solving skills, someone might say, “A simple-minded approach won’t solve complex issues.”
A person might use this term to describe themselves, saying, “I can be a bit simple-minded when it comes to math.”

27. Stupe

This slang term is used to refer to someone who is considered stupid or lacking in intelligence.

For instance, “Don’t listen to him, he’s a complete stupe.”
In a conversation about someone’s actions, one might say, “He pulled a real stupe move by forgetting his keys.”
A person might use this term humorously, saying, “I can be a bit of a stupe when it comes to technology.”

28. Thickwit

This term is used to describe someone who is not very intelligent or has a slow mental processing speed.

For example, “He’s such a thickwit, it takes him forever to understand simple concepts.”
In a discussion about problem-solving abilities, someone might say, “A thickwit approach won’t lead to effective solutions.”
A person might use this term to describe themselves humorously, saying, “I can be a bit of a thickwit when it comes to directions.”

29. Birdbrain

This slang term is used to describe someone who is considered unintelligent or forgetful.

For instance, “She’s such a birdbrain, she can never remember where she left her keys.”
In a conversation about someone’s forgetfulness, one might say, “I’m such a birdbrain, I forgot my own phone number.”
A person might use this term humorously, saying, “I can be a bit of a birdbrain when it comes to remembering names.”

30. Bozo

This term is used to describe someone who is considered silly, foolish, or lacking intelligence.

For example, “Don’t listen to him, he’s a complete bozo.”
In a conversation about someone’s actions, one might say, “He pulled a real bozo move by tripping over his own feet.”
A person might use this term humorously, saying, “I can be a bit of a bozo when it comes to telling jokes.”

31. Ignoramus

This term is used to describe someone who is completely ignorant or lacking in knowledge or intelligence.

For example, “Don’t listen to him, he’s just an ignoramus.”
In a heated debate, one person might insult the other by saying, “You’re such an ignoramus, you have no idea what you’re talking about.”
A teacher might refer to a student who consistently fails to understand the material as an ignoramus.

32. Jackass

This word is used to refer to someone who is acting foolishly or making stupid decisions.

For instance, “Stop being such a jackass and think before you speak.”
In a prank gone wrong, one person might say to another, “You’re such a jackass for pulling that stunt.”
A frustrated parent might scold their child, “You’re acting like a jackass, go to your room!”

33. Lunkhead

This term is used to describe someone who is not very intelligent or seems slow to understand things.

For example, “He’s a lunkhead, it takes him forever to grasp simple concepts.”
In a group project, one person might complain about another, “I can’t believe I have to work with that lunkhead.”
A friend might jokingly call their buddy a lunkhead after they make a silly mistake.

34. Nimrod

This word is used to describe someone who is inept or foolish, often in a sarcastic or mocking way.

For instance, “Nice job, nimrod, you just spilled coffee all over your shirt.”
In a game of basketball, one player might taunt another by saying, “You can’t make a shot, you’re such a nimrod.”
A teacher might scold a student, “Stop acting like a nimrod and pay attention!”

35. Noodlehead

This term is used to describe someone who is not very bright or often forgetful.

For example, “I can’t believe I forgot my keys again, I’m such a noodlehead.”
In a conversation about forgetfulness, one person might say, “I’m such a noodlehead, I always forget important dates.”
A parent might affectionately tease their child, “You’re such a little noodlehead, always getting into silly situations.”

36. Numpty

Numpty is a Scottish slang term used to describe someone who is foolish or stupid. It is often used in a playful or teasing manner.

For example, “Don’t be such a numpty and put the milk in the pantry.”
In a friendly banter, one might say, “You numpty, you forgot your keys again.”
A person might jokingly refer to themselves as a numpty when they make a silly mistake, “I locked myself out of the car. I’m such a numpty.”

37. Peabrain

Peabrain is an informal term used to describe someone who is extremely unintelligent or has a limited capacity for understanding.

For instance, “He couldn’t solve a simple math problem. What a peabrain.”
In a discussion about someone’s decision-making skills, one might say, “Only a peabrain would think that’s a good idea.”
A person might use the term peabrain to describe themselves when they make a silly mistake, “I forgot my own phone number. I’m such a peabrain.”

38. Schmuck

Schmuck is a Yiddish slang term used to describe someone who is foolish, obnoxious, or contemptible. It is often used in a derogatory manner.

For example, “He cheated on his girlfriend. What a schmuck.”
In a conversation about someone’s poor decision, one might say, “You’re really going to eat that expired yogurt? You’re such a schmuck.”
A person might use the term schmuck to describe themselves when they do something foolish, “I locked myself out of the house again. I’m such a schmuck.”

39. Simple

Simple is a term used to describe someone who lacks intelligence, common sense, or understanding. It is often used in a derogatory manner.

For instance, “He couldn’t figure out how to turn on the TV. He’s so simple.”
In a conversation about someone’s lack of knowledge, one might say, “You don’t know who Shakespeare is? That’s simple.”
A person might use the term simple to describe themselves when they make a foolish mistake, “I accidentally put salt in my coffee instead of sugar. I’m so simple.”

40. Thicko

Thicko is a slang term used to describe someone who is extremely unintelligent or slow-witted. It is often used in a playful or teasing manner.

For example, “He couldn’t understand the simplest instructions. What a thicko.”
In a friendly banter, one might say, “You’re such a thicko for forgetting your own birthday.”
A person might jokingly refer to themselves as a thicko when they make a silly mistake, “I tried to open the car door with my house key. I’m such a thicko.”

41. Wally

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

For example, “Stop being such a wally and use your common sense!”
Someone might say, “I can’t believe I did something so wally-like.”
In a conversation about someone’s silly mistake, one might comment, “Wow, what a wally move!”

42. Woodenhead

This term refers to someone who is extremely slow-witted or dense. It is often used to mock or criticize someone’s lack of intelligence.

For instance, “He’s such a woodenhead, he never understands anything.”
A person might say, “I feel like a woodenhead for not understanding that simple concept.”
In a comedic context, someone might exclaim, “What a woodenhead! Can’t even tie his own shoelaces!”

43. Yo-yo

This slang term is used to describe someone who is foolish or simple-minded. It is often used to express frustration or annoyance with someone’s lack of intelligence.

For example, “Don’t be such a yo-yo, it’s not that difficult to understand.”
Someone might say, “I can’t believe I did something so yo-yoish.”
In a conversation about someone’s repeated mistakes, one might comment, “He’s a real yo-yo, always messing up.”

44. Zilch

This term is used to describe someone who has absolutely no intelligence or common sense. It is often used in a dismissive or derogatory manner.

For instance, “He’s got zilch in the brains department.”
A person might say, “I feel like a zilch for not understanding that simple concept.”
In a conversation about someone’s lack of knowledge, one might comment, “She’s a total zilch when it comes to history.”

45. Dinglehead

This slang term refers to someone who is lacking in intelligence or common sense. It is often used to describe someone who is forgetful or absent-minded.

For example, “She’s such a dinglehead, she can’t even remember her own phone number.”
Someone might say, “I feel like a dinglehead for forgetting such a basic fact.”
In a conversation about someone’s absent-mindedness, one might comment, “He’s a real dinglehead, always losing his keys.”

46. Dingbat

A derogatory term used to describe someone who is considered foolish or stupid. It is often used in a playful or lighthearted manner.

For example, “Don’t be such a dingbat, you forgot your keys again.”
A person might jokingly say, “I can’t believe I did that, I’m such a dingbat.”
In a comedic TV show, a character might call another character a dingbat after they make a silly mistake.

47. Dunderbrain

A slang term used to refer to someone who is lacking in intelligence or common sense. It is often used in a joking or teasing manner.

For instance, “You’re such a dunderbrain, how did you forget your own birthday?”
A person might playfully say, “I can’t believe I locked myself out of the car again, I’m such a dunderbrain.”
In a comedy skit, a character might call another character a dunderbrain after they make a silly blunder.

48. Goof

A term used to describe someone who is acting foolishly or making mistakes. It can also refer to someone who is being playful or lighthearted.

For example, “Stop being such a goof and focus on your work.”
A person might say, “I’m in the mood to goof around and have some fun.”
In a comedy routine, a performer might act like a goof to entertain the audience.

49. Ignorant

A term used to describe someone who lacks knowledge or awareness about a particular subject. It can also refer to someone who is intentionally disregarding information.

For instance, “You’re so ignorant, you don’t even know basic facts about history.”
A person might say, “It’s important to educate ourselves so we don’t remain ignorant.”
In a political debate, one person might accuse the other of being ignorant about the issues.

50. Imbecile

A derogatory term used to describe someone who is considered extremely foolish or stupid. It is often used in a more serious or offensive manner.

For example, “You’re such an imbecile, how did you manage to fail such a simple task?”
A person might angrily say, “I can’t believe I trusted you, you imbecile.”
In a heated argument, one person might insult the other by calling them an imbecile.

51. Dunce

A dunce refers to a person who is considered to be stupid or unintelligent. It is often used to mock someone’s lack of knowledge or ability.

For example, if someone makes a foolish mistake, you might say, “What a dunce!”
In a classroom setting, a teacher might use the term to scold a student for not paying attention, saying, “Stop acting like a dunce!”
If someone struggles with a simple task, you could comment, “Wow, they’re a real dunce when it comes to that.”

52. Ditz

A ditz is a term used to describe someone who is perceived as being silly, scatterbrained, or lacking common sense. It is often used in a lighthearted or affectionate manner.

For instance, if someone forgets their keys for the third time in a week, you might playfully say, “You’re such a ditz!”
When someone says or does something silly, you could laugh and say, “Oh, you’re such a ditz sometimes.”
If someone is known for being forgetful or making silly mistakes, you might affectionately refer to them as a “loveable ditz.”

53. Clod

A clod is a term used to describe someone who is seen as dull-witted, clumsy, or lacking intelligence. It is often used to express frustration or annoyance with someone’s behavior or actions.

For example, if someone spills a drink for the third time in a row, you might exclaim, “What a clod!”
When someone makes a foolish mistake, you could say, “Only a clod would do something like that.”
If someone consistently fails to understand a simple concept, you might comment, “They’re such a blockhead.”