Top 65 Slang For Psychological – Meaning & Usage

Exploring the world of psychology can be fascinating and enlightening, but understanding the slang used in this field can be a whole different ball game. Whether you’re a psychology student, a mental health advocate, or just intrigued by the human mind, our team has delved into the depths of psychological jargon to bring you a curated list of the top slang terms used in the realm of psychology. Get ready to expand your vocabulary and dive into the fascinating world of psychological slang!

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1. Bonkers

Used to describe someone or something that is completely insane or out of control.

For example, “That roller coaster ride was bonkers!”
A person might say, “I can’t believe how bonkers that movie was.”
Another might exclaim, “This party is getting bonkers!”

2. Loopy

Refers to someone who is eccentric or behaves in a strange, unpredictable manner.

For instance, “She’s a bit loopy, always coming up with wild ideas.”
A person might say, “I feel loopy after staying up all night.”
Another might comment, “His loopy behavior is entertaining to watch.”

3. Cuckoo

Used to describe someone or something that is mentally unstable or irrational.

For example, “He’s gone completely cuckoo!”
A person might say, “This idea is cuckoo, it’ll never work.”
Another might exclaim, “She’s acting cuckoo, talking to herself and laughing for no reason.”

4. Cray-cray

A slang term for “crazy” that emphasizes the extreme or intense nature of something.

For instance, “That party last night was cray-cray!”
A person might say, “I can’t believe how cray-cray this situation is.”
Another might comment, “Her outfit is cray-cray, but it looks amazing.”

5. Schizo

A derogatory term used to describe someone who exhibits erratic or unpredictable behavior. It is derived from the clinical term “schizophrenia,” a psychiatric disorder characterized by a disconnection from reality.

For example, “Don’t mind her, she’s a bit schizo.”
A person might say, “His mood swings make him seem schizo.”
Another might comment, “The weather has been schizo lately, going from sunny to stormy within hours.”

6. Bipolar

Refers to a mental disorder characterized by extreme shifts in mood, energy, and activity levels. The term “bipolar” is often used colloquially to describe someone who has a tendency to act in contradictory or inconsistent ways.

For instance, someone might say, “She’s so bipolar, one minute she’s happy and the next she’s angry.”
In a discussion about personality traits, someone might comment, “I feel like I have a bit of a bipolar personality sometimes.”
A person describing their own behavior might say, “I can be a bit bipolar when it comes to making decisions.”

7. Depressed

Refers to a mental state characterized by feelings of extreme sadness, hopelessness, and a lack of interest or pleasure in activities. The term “depressed” is often used colloquially to describe a temporary state of sadness or low mood.

For example, someone might say, “I’m feeling really depressed today, I just can’t shake this sadness.”
In a conversation about emotions, someone might mention, “I’ve been feeling a bit depressed lately, I think I need to talk to someone.”
A person describing their own experience might say, “I’ve struggled with depression on and off for years.”

8. Anxious

Refers to a state of excessive worry, fear, or unease. The term “anxious” is often used colloquially to describe feeling nervous or on edge.

For instance, someone might say, “I’m feeling really anxious about the upcoming presentation.”
In a conversation about stress, someone might mention, “I tend to get anxious in social situations.”
A person describing their own experience might say, “I’ve always been a bit anxious, but lately it’s been worse than usual.”

9. OCD

Refers to a mental disorder characterized by obsessive thoughts and compulsive behaviors. The term “OCD” is often used colloquially to describe someone who is very particular or has a strong desire for order and cleanliness.

For example, someone might say, “I’m so OCD about keeping my desk organized.”
In a discussion about personality traits, someone might comment, “I have a bit of OCD when it comes to my daily routine.”
A person describing their own behavior might say, “I know it’s a bit OCD, but I can’t stand when things are out of place.”

10. PTSD

Refers to a mental disorder that can develop after experiencing or witnessing a traumatic event. The term “PTSD” is often used colloquially to describe someone who is haunted by past experiences or memories.

For instance, someone might say, “He’s been through so much, he’s got PTSD.”
In a conversation about the impact of trauma, someone might mention, “PTSD can have long-lasting effects on a person’s mental health.”
A person describing their own experience might say, “I’ve been diagnosed with PTSD and it’s been a difficult journey.”

11. Looney tunes

This term is used to describe someone who is mentally unstable or exhibiting irrational behavior. It is often used in a lighthearted or humorous way.

For example, “She’s acting completely looney tunes today.”
In a discussion about someone’s erratic behavior, one might say, “He’s gone a bit looney tunes lately.”
A person describing their own eccentricities might jokingly say, “I’ve got a few looney tunes moments myself.”

12. Nutter

This slang term is used to describe someone who is mentally unstable or exhibiting irrational behavior. It is often used in a derogatory or dismissive manner.

For instance, “Don’t listen to him, he’s a complete nutter.”
In a conversation about someone’s odd actions, one might comment, “He’s a real nutter, that one.”
A person might use the term to describe themselves in a self-deprecating way, saying, “I can be a bit of a nutter sometimes.”

13. Basket case

This term is used to describe someone who is emotionally or mentally unstable. It implies that the person is unable to function or cope with life’s challenges.

For example, “After the breakup, she became a complete basket case.”
In a discussion about someone’s emotional breakdown, one might say, “He’s been a basket case ever since he lost his job.”
A person might use the term to describe their own emotional state, saying, “I was a total basket case during the exam.”

14. Cracked

This slang term is used to describe someone who is mentally unstable or exhibiting irrational behavior. It suggests that the person’s mind is “cracked” or damaged.

For instance, “He’s completely cracked, talking to imaginary friends.”
In a conversation about someone’s unusual beliefs, one might comment, “He’s cracked, thinking the government is spying on him.”
A person might use the term to describe themselves in a self-aware way, saying, “I know I’m a bit cracked, but that’s what makes me unique.”

15. Screw loose

This phrase is used to describe someone who is mentally unstable or exhibiting irrational behavior. It suggests that the person’s mind is not functioning properly and has a “screw loose.”

For example, “She’s got a screw loose if she thinks she can fly.”
In a discussion about someone’s bizarre actions, one might say, “He’s got a few screws loose, that’s for sure.”
A person might use the phrase to describe their own quirks, saying, “I admit I’ve got a screw loose, but it keeps life interesting.”

16. Off their rocker

This phrase is used to describe someone who is behaving in a irrational or unpredictable manner. It suggests that the person has lost touch with reality or is mentally unstable.

For example, “The guy on the bus was completely off his rocker, shouting at invisible people.”
In a conversation about a friend’s strange behavior, one might say, “I think she’s a bit off her rocker lately.”
A person might describe a chaotic situation as, “It was like everyone was off their rocker at the party.”

17. Mental

This term is used colloquially to describe someone or something as crazy or insane. It can be used to refer to a person’s behavior or a situation that seems irrational or illogical.

For instance, “He went mental when he found out he lost his job.”
In a discussion about a bizarre incident, someone might say, “That’s just mental, I can’t believe it happened.”
A person might describe a chaotic situation as, “It was mental in there, people were screaming and running everywhere.”

18. Unhinged

This word is used to describe someone who is emotionally unstable or mentally disturbed. It implies that the person’s behavior is unpredictable or erratic.

For example, “She became completely unhinged after the breakup, crying and screaming.”
In a conversation about a coworker’s strange behavior, one might say, “I think he’s a bit unhinged, he’s been acting really paranoid.”
A person might describe a violent outburst as, “He went completely unhinged and started throwing things.”

19. Psychoanalysis

Psychoanalysis is a psychological therapy that aims to uncover unconscious thoughts and emotions that may be causing distress or influencing behavior. It involves talking with a trained psychoanalyst to gain insight into one’s thoughts, feelings, and past experiences.

For instance, “She has been undergoing psychoanalysis to better understand her anxiety.”
In a discussion about different therapy approaches, one might say, “Psychoanalysis focuses on exploring the unconscious mind.”
A person might recommend psychoanalysis to a friend, saying, “You should consider psychoanalysis, it can help you uncover deeper issues.”

20. Shrink

This word is a colloquial term used to refer to a psychiatrist or psychologist. It is derived from the idea that these professionals help “shrink” or alleviate mental distress or problems.

For example, “I have an appointment with my shrink tomorrow to discuss my anxiety.”
In a conversation about seeking therapy, someone might say, “I think I need to see a shrink, I’ve been feeling really down lately.”
A person might jokingly refer to a friend as their shrink, saying, “Thanks for listening to me vent, you’re like my personal shrink.”

21. Mind games

This term refers to the tactics used by individuals to control or manipulate others’ thoughts, emotions, or behaviors for their own benefit. It can involve tactics such as gaslighting, guilt-tripping, or mind control.

For example, “She played mind games with her ex-boyfriend to make him jealous.”
In a discussion about toxic relationships, someone might say, “Mind games are a common tactic used by emotional abusers.”
A person sharing their experience might say, “I was constantly subjected to mind games in my previous workplace, which caused a lot of stress and anxiety.”

22. Therapy

This term refers to the process of receiving professional assistance to address and manage psychological or emotional issues. Therapy can involve various approaches, such as talk therapy, cognitive-behavioral therapy, or group therapy.

For instance, “She started therapy to work through her childhood trauma.”
A person might recommend, “If you’re struggling with anxiety, therapy can be really helpful.”
Someone might share, “Therapy has been a crucial part of my journey towards self-discovery and healing.”

23. Cuckoo’s nest

This term is a slang phrase used to refer to a psychiatric hospital or a mental institution. It originates from the title of the novel “One Flew Over the Cuckoo’s Nest” by Ken Kesey, which depicts life in a mental institution.

For example, “He was admitted to the cuckoo’s nest after a severe breakdown.”
In a conversation about mental health facilities, someone might say, “Back in the old days, people were often locked up in the cuckoo’s nest.”
A person might use it metaphorically and say, “Sometimes my mind feels like a cuckoo’s nest, with chaotic thoughts and emotions.”

24. Loony bin

This term is a derogatory slang phrase used to refer to a psychiatric hospital or a mental institution. It is considered offensive and stigmatizing towards individuals with mental health conditions.

For instance, “She was institutionalized in the loony bin for her own safety.”
In a discussion about mental health awareness, someone might say, “Using terms like ‘loony bin’ only perpetuates the stigma surrounding mental illness.”
A person might express their disapproval and say, “It’s important to use respectful and inclusive language when talking about psychiatric hospitals.”

25. Rubber room

This term is slang for an isolation room or padded cell in a psychiatric hospital. It refers to a room with soft walls or padding to prevent self-harm or injury to the person inside.

For example, “He was placed in a rubber room after exhibiting violent behavior.”
In a conversation about mental health treatment, someone might say, “Rubber rooms are used as a last resort to ensure the safety of individuals in crisis.”
A person might express concern and say, “Being confined to a rubber room can be extremely distressing for someone already struggling with their mental health.”

26. Straight jacket

A straight jacket is a garment made of strong material that is used to restrain a person’s arms and torso. It is often associated with mental institutions and used to prevent self-harm or injury.

For example, in a discussion about mental health treatment, someone might say, “The use of straight jackets has significantly decreased in modern psychiatric care.”
In a metaphorical sense, a person might say, “I feel like I’m trapped in a straight jacket of my own thoughts.”
Another might use the term to describe a restrictive situation, saying, “The strict rules and regulations feel like a straight jacket on my creativity.”

27. Crazy pills

This term is used to refer to medication prescribed for mental health conditions. It is often used in a humorous or colloquial manner to describe situations or behaviors that seem irrational or bizarre.

For instance, someone might say, “I must have forgotten to take my crazy pills today” when they are acting in an unusual way.
In a discussion about mental health, a person might say, “Finding the right crazy pills can make a world of difference in managing symptoms.”
Another might use the term to describe a chaotic or unpredictable situation, saying, “It’s been a day of crazy pills at work.”

28. Brain fart

A brain fart refers to a temporary lapse in memory or a momentary inability to think clearly. It is often used in a lighthearted or humorous manner to describe situations where someone forgets something obvious or makes a silly mistake.

For example, someone might say, “Sorry, I just had a brain fart and forgot your name for a second.”
In a discussion about cognitive functioning, a person might say, “Sometimes a brain fart is just a sign of mental fatigue.”
Another might use the term to describe a moment of confusion or indecision, saying, “I had a brain fart and couldn’t remember which way to turn.”

29. Mind over matter

This phrase suggests that the power of the mind can overcome physical challenges or obstacles. It is often used to encourage someone to focus on their mental resilience and determination.

For instance, a coach might say to an athlete, “Believe in yourself and remember, it’s all about mind over matter.”
In a discussion about pain management, a person might say, “I try to practice mind over matter techniques to cope with chronic pain.”
Another might use the phrase to describe a situation where mental fortitude is necessary, saying, “In extreme conditions, it’s truly a test of mind over matter.”

30. Freudian slip

A Freudian slip is when someone unintentionally says something that reveals their true thoughts or feelings, often related to their unconscious desires or motivations. It is named after Sigmund Freud, the founder of psychoanalysis.

For example, if someone accidentally says, “I love you” instead of “thank you” to a friend, it could be interpreted as a Freudian slip indicating deeper feelings.
In a discussion about psychology, a person might say, “Freud believed that Freudian slips were a window into the unconscious mind.”
Another might use the term to describe a situation where someone unintentionally reveals their true intentions, saying, “His Freudian slip during the meeting made us question his true motives.”

31. Split personality

This term refers to a mental disorder characterized by the presence of two or more distinct personality states. These different personalities, or “alters,” may have their own unique behaviors, thoughts, and memories.

For example, “Did you hear about that movie where the main character has a split personality?”
In a discussion about mental health, someone might say, “Split personality is a rare condition, but it can have significant impacts on a person’s life.”
A person sharing their own experience might say, “Living with split personality can be incredibly challenging, but therapy and support have helped me manage it.”

32. Nervous breakdown

This phrase is used to describe a period of intense mental distress or an inability to function normally due to overwhelming stress or emotional strain. It is often characterized by symptoms such as extreme anxiety, depression, or even physical symptoms like shaking or crying.

For instance, “She had a nervous breakdown after working long hours for weeks.”
In a conversation about mental well-being, someone might say, “It’s important to take breaks and prioritize self-care to avoid a nervous breakdown.”
A person sharing their experience might say, “I had a nervous breakdown last year, but therapy and support helped me recover.”

33. Insane in the membrane

This phrase is a slang expression used to describe someone who is behaving in a bizarre or irrational manner. It suggests a level of mental instability or eccentricity.

For example, “That guy is completely insane in the membrane, he talks to invisible beings.”
In a discussion about unusual behavior, someone might say, “People often label others as insane in the membrane when they can’t understand their actions.”
A person jokingly describing themselves might say, “Sometimes I feel like I’m going insane in the membrane with all the stress in my life.”

34. Psychotherapy

Psychotherapy is a form of treatment for mental health disorders that involves talking with a trained therapist. The goal of psychotherapy is to help individuals understand their thoughts, emotions, and behaviors, and to develop coping strategies and make positive changes in their lives.

For instance, “She has been undergoing psychotherapy to address her anxiety.”
In a conversation about mental health treatment options, someone might say, “Psychotherapy can be incredibly beneficial for individuals struggling with various mental health issues.”
A person sharing their own experience might say, “I’ve been in psychotherapy for a few months now, and it has helped me gain valuable insights into myself.”

35. Mind control

This term refers to the ability to exert influence or control over someone’s thoughts, beliefs, or actions. It can imply a level of manipulation or coercion, often in a negative or dystopian context.

For example, “The villain in the movie had the power of mind control, making others do his bidding.”
In a discussion about psychological manipulation, someone might say, “Mind control techniques can be used to exploit vulnerable individuals.”
A person sharing their thoughts might say, “Sometimes I feel like advertising and media use mind control tactics to influence our behavior.”

36. Mental breakdown

A mental breakdown refers to a period of intense emotional distress or an inability to cope with daily life. It is often characterized by overwhelming feelings of sadness, anxiety, or despair.

For example, “After months of stress, she finally had a mental breakdown and had to take a leave from work.”
In a discussion about mental health, someone might say, “I’ve been struggling lately and feel like I’m on the verge of a mental breakdown.”
A person sharing their experience might mention, “During my mental breakdown, I couldn’t stop crying and felt completely overwhelmed.”

37. Crazy town

Used to describe a situation or event that is completely out of control or beyond comprehension. “Crazy town” emphasizes the level of chaos or madness in a particular situation.

For instance, “The party last night was absolute crazy town. People were dancing on tables and throwing drinks.”
In a discussion about a hectic work environment, someone might say, “Things have been crazy town at the office lately. We’re all overwhelmed with deadlines.”
A person describing a wild concert might exclaim, “The energy in the crowd was insane. It was like being in crazy town!”

38. Brainiac

A slang term used to describe someone who is extremely intelligent or knowledgeable. “Brainiac” is often used in a lighthearted or playful manner.

For example, “She’s such a brainiac. She always knows the answer to every question.”
In a conversation about academic achievements, someone might say, “He’s a total brainiac. He’s already published multiple research papers.”
A person complimenting someone’s intelligence might say, “You’re a real brainiac when it comes to solving puzzles.”

39. Brain freeze

A brain freeze refers to a sudden, intense headache that occurs after consuming something cold, such as ice cream or a frozen beverage, too quickly. It is often described as a sharp, stabbing pain in the forehead or temples.

For instance, “I ate my ice cream too quickly and got a brain freeze.”
In a discussion about summer treats, someone might say, “I love ice cream, but I always get brain freeze if I eat it too fast.”
A person sharing a funny anecdote might say, “I was enjoying my milkshake and then bam, brain freeze!”

40. Crazy

Used to describe someone or something that is behaving in a wild, erratic, or unpredictable manner. “Crazy” can also refer to something that is extraordinary or unbelievable.

For example, “She went crazy and started throwing things when she found out.”
In a conversation about an unbelievable story, someone might say, “You won’t believe what happened to me yesterday. It was absolutely crazy!”
A person describing a thrilling experience might exclaim, “That roller coaster was crazy! I’ve never felt such a rush before.”

41. Nutty

This term is used to describe someone who is mentally unstable or exhibits strange behavior. It can also be used to describe something that is absurd or ridiculous.

For example, “He’s been acting really nutty lately, talking to himself and wearing mismatched socks.”
In a conversation about a bizarre situation, someone might say, “That’s the nuttiest thing I’ve ever heard.”
A person might describe a chaotic party as “a nutty scene with people dancing on tables.”

42. Nuts

This slang term is used to describe someone or something that is crazy or irrational. It can also be used to express disbelief or frustration.

For instance, “She went nuts when she found out he cheated on her.”
In a discussion about a dangerous stunt, someone might say, “Only a nuts person would attempt that.”
A person might exclaim, “You’ve got to be nuts if you think I’ll lend you money.”

43. Off the rails

This phrase is used to describe someone or something that is behaving in a wild or uncontrollable manner. It can also refer to a situation that has become chaotic or extreme.

For example, “After losing his job, he went off the rails and started partying every night.”
In a discussion about a concert, someone might say, “The crowd went off the rails when their favorite band took the stage.”
A person might describe a project as “off the rails” if it becomes disorganized and chaotic.

44. Batty

This slang term is used to describe someone who is mentally unstable or eccentric. It can also be used to describe something that is strange or bizarre.

For instance, “She’s a bit batty, always talking to her pet parrot.”
In a conversation about a peculiar fashion choice, someone might say, “That hat looks really batty.”
A person might describe a haunted house as “a batty old mansion with creaky stairs.”

45. Whacko

This term is used to describe someone who is mentally unstable or exhibits odd behavior. It can also be used to describe something that is absurd or unbelievable.

For example, “He’s a complete whacko, always ranting about conspiracy theories.”
In a discussion about a bizarre news story, someone might say, “That’s whacko, I can’t believe it actually happened.”
A person might describe a horror movie as “a whacko film with twisted plot twists.”

46. Demented

This term is used to describe someone who is mentally unstable or has a deranged mind. It implies a severe disturbance in a person’s mental state.

For example, “His demented behavior was a cause for concern.”
In a discussion about psychological disorders, one might say, “Schizophrenia is characterized by demented thoughts and hallucinations.”
A person might describe a horror movie as “demented” if it contains disturbing or twisted elements.

47. Out of your mind

This phrase is used to describe someone who is acting in a crazy or insane manner. It suggests that the person’s thoughts or actions are irrational or illogical.

For instance, “Are you out of your mind? That’s a dangerous idea.”
In a heated argument, one person might accuse the other of being “out of their mind.”
A person might use this phrase to describe a risky or reckless behavior, saying, “Jumping off a cliff? You must be out of your mind!”

48. Mad as a hatter

This expression originates from the character of the Mad Hatter in Lewis Carroll’s “Alice’s Adventures in Wonderland.” It is used to describe someone who is crazy or eccentric, often as a result of being exposed to toxic substances like mercury.

For example, “He’s as mad as a hatter with his wild theories.”
When someone displays irrational or erratic behavior, another person might say, “You’re acting mad as a hatter.”
A person might use this phrase to describe a friend who has unique and unconventional habits, saying, “She’s a bit mad as a hatter, but that’s what makes her interesting.”

49. Not playing with a full deck

This phrase is used to suggest that someone is mentally incompetent or lacking intelligence. It implies that the person is not thinking or functioning at their full capacity.

For instance, “He’s not playing with a full deck if he thinks that plan will work.”
In a discussion about someone’s questionable decisions, another person might say, “Clearly, he’s not playing with a full deck.”
A person might use this phrase to describe a coworker who consistently makes poor choices or demonstrates a lack of understanding, saying, “I don’t trust him to handle important tasks. He’s not playing with a full deck.”

50. One sandwich short of a picnic

This phrase is used to describe someone who is not mentally all there or lacks intelligence. It suggests that the person is missing something essential or is not fully functioning mentally.

For example, “She’s one sandwich short of a picnic if she believes that conspiracy theory.”
When someone says or does something foolish, another person might jokingly say, “You’re one sandwich short of a picnic, aren’t you?”
A person might use this phrase to describe a friend who often forgets things or makes silly mistakes, saying, “He’s a great guy, but he’s definitely one sandwich short of a picnic.”

51. Touched in the head

This phrase is used to describe someone who is considered mentally ill or unstable. It suggests that their mind has been affected in some way.

For example, “He’s completely touched in the head, talking to imaginary people.”
Another usage could be, “She’s acting really strange lately, like she’s touched in the head.”
In a discussion about mental health, someone might say, “Using derogatory terms like ‘touched in the head’ only perpetuates the stigma surrounding mental illness.”

52. Round the bend

This phrase is used to describe someone who is mentally unstable or irrational. It suggests that the person’s thoughts or behavior are going in circles or not making sense.

For instance, “He’s gone round the bend, talking about conspiracy theories all day.”
Another usage could be, “I think all the stress has finally made her go round the bend.”
In a conversation about mental health, someone might say, “It’s important to recognize the signs of someone going round the bend and offer support.”

53. Lost the plot

This phrase is used to describe someone who has become mentally unstable or confused. It suggests that the person has lost their ability to think or reason clearly.

For example, “Ever since the accident, he’s lost the plot and can’t remember anything.”
Another usage could be, “She’s been under a lot of stress lately and seems to have lost the plot.”
In a discussion about mental health, someone might say, “It’s important to seek help if you feel like you’re losing the plot.”

54. Out to lunch

This phrase is used to describe someone who is not mentally present or aware of their surroundings. It suggests that the person is absent-minded or disconnected from reality.

For instance, “He’s always out to lunch, never paying attention to what’s happening.”
Another usage could be, “She seems out to lunch today, not responding to anything.”
In a conversation about mental health, someone might say, “Feeling out to lunch can be a sign of burnout or depression.”

55. Loon

This term is used to describe someone who is considered crazy or mentally unstable. It is often used in a derogatory manner.

For example, “He’s a complete loon, always saying strange things.”
Another usage could be, “She’s acting like a loon, talking to herself.”
In a discussion about mental health, someone might say, “Using derogatory terms like ‘loon’ only perpetuates the stigma surrounding mental illness.”

56. Kook

“Kook” is a slang term used to describe someone who is eccentric, strange, or mentally unstable. It is often used in a lighthearted or humorous way.

For example, someone might say, “He’s a total kook, always coming up with wild theories.”
In a discussion about unusual hobbies, one might comment, “I met this kook who collects vintage typewriters.”
A person might jokingly refer to themselves as a kook, saying, “I must be a kook for enjoying spicy food so much!”

57. Madman

“Madman” is a slang term used to describe someone who is mentally unstable or behaves in a wild and unpredictable manner. It can also be used to express admiration or awe for someone’s extreme actions.

For instance, someone might say, “He’s a madman behind the wheel, always speeding and taking risks.”
In a discussion about extreme sports, one might comment, “Only a madman would jump off a cliff with a parachute.”
A person might describe a musician’s performance as “madman energy,“madman energy,” meaning it was intense and electrifying.

58. Lunatic

A derogatory slang term used to describe someone who is mentally unstable or exhibits erratic behavior. It is considered offensive and should be used with caution.

For example, someone might say, “Stay away from him, he’s a total lunatic.”
In a discussion about strange conspiracy theories, one might comment, “Only a lunatic would believe that aliens control the government.”
A person might use the term self-deprecatingly, saying, “I must be a lunatic for signing up for a marathon without any training!”

59. Fruit loop

A slang term used to describe someone who is eccentric, strange, or mentally unstable. It is often used in a lighthearted or humorous way, referencing the colorful breakfast cereal “Froot Loops.”

For instance, someone might say, “She’s a real fruit loop, always wearing mismatched clothes.”
In a discussion about unusual talents, one might comment, “I met this guy who can juggle flaming torches, what a fruit loop!”
A person might jokingly refer to themselves as a fruit loop, saying, “I must be a fruit loop for enjoying pineapple on pizza!”

60. Off the rocker

A slang term used to describe someone who is mentally unstable or behaves in a bizarre and unpredictable manner. It suggests that the person’s mental state is so unstable that they have fallen off a metaphorical rocking chair.

For example, someone might say, “He’s completely off his rocker, talking to imaginary friends.”
In a discussion about outrageous behavior, one might comment, “She really went off her rocker at the party last night.”
A person might use the term self-deprecatingly, saying, “I must be off my rocker for thinking I can learn to play the guitar overnight!”

61. Cuckoo for Cocoa Puffs

This phrase is used to describe someone who is mentally unstable or acting in an irrational manner. It is derived from the popular cereal brand Cocoa Puffs and the character Sonny the Cuckoo Bird, who is depicted as crazy or obsessed with the cereal.

For example, “She’s completely cuckoo for Cocoa Puffs. She believes in conspiracy theories.”
In a discussion about eccentric behavior, someone might say, “He’s a bit cuckoo for Cocoa Puffs, always coming up with wild ideas.”
A person might jokingly refer to themselves as “cuckoo for Cocoa Puffs” when they have a strong craving for something.

62. Daft

This term is used to describe someone who is lacking common sense or acting in a foolish manner. It is often used in a lighthearted or playful manner.

For instance, “Don’t be daft, it’s obvious that won’t work.”
In a conversation about someone making a silly mistake, one might say, “He did something daft and ended up getting himself into trouble.”
A person might jokingly call themselves “daft” when they make a silly or clumsy mistake.

63. Barmy

This word is used to describe someone who is slightly mad or eccentric. It is often used in a humorous or affectionate way.

For example, “He’s a bit barmy, always coming up with strange ideas.”
In a discussion about unconventional behavior, one might say, “She’s a bit barmy, but that’s what makes her unique.”
A person might jokingly refer to themselves as “barmy” when they do something out of the ordinary.

64. Cracked up

This phrase is used to describe someone who is mentally unstable or emotionally distressed. It suggests that the person’s mind or emotions are fractured or broken.

For instance, “After the accident, he was really cracked up and needed therapy.”
In a conversation about someone experiencing a mental breakdown, one might say, “She’s really cracked up, I think she needs professional help.”
A person might use this phrase to describe themselves when they are feeling overwhelmed or emotionally unstable.

65. Whackjob

This term is used to describe someone who is mentally unstable or acting in an irrational manner. It is often used in a derogatory or dismissive way.

For example, “I can’t believe he believes in those conspiracy theories, he’s a total whackjob.”
In a discussion about someone exhibiting strange behavior, one might say, “She’s a real whackjob, always talking to herself.”
A person might use this term to insult someone they perceive as crazy or irrational.