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Idioms for going crazy are a fun and interesting aspect of the English language. They add color and personality to our everyday conversations, and can even be used to express complex emotions and ideas concisely and memorably. From “going bananas” to “losing your marbles,” there are countless idioms that describe various levels of craziness and insanity.

Idioms for Going Crazy

Crazy Idioms
Crazy Idioms – Created by 7ESL
  • Blow one’s top
  • Blow up
  • Fly off the handle
  • Flip out
  • Flip one’s lid
  • Freak out
  • Go ape
  • Go ballistic
  • Go bananas
  • Go berserk
  • Go bonkers
  • Go haywire
  • Go postal
  • Go mental
  • Go nuts
  • Go off the deep end
  • Hit the roof
  • Lose it
  • Lose one’s marbles
  • Off one’s rocker
  • Pop one’s cork

Idioms for Going Crazy with Meaning and Examples

Blow one’s top

  • Meaning: Lose one’s temper or become very angry.
  • Example: “He blew his top when he found out he was fired from his job.”

Blow up

  • Meaning: Explode or become very angry.
  • Example: “She blew up when she saw the mess in the kitchen.”

Fly off the handle

  • Meaning: Suddenly become very angry or lose control of one’s emotions.
  • Example: “He flew off the handle when he heard the news.”

Flip one’s lid

  • Meaning: To become very angry or upset.
  • Example: She flipped her lid when she saw that her phone was broken.

Flip out

  • Meaning: very angry or excited
  • Example: “My sister flipped out when she saw the surprise party we had planned for her.”

Freak out

  • Meaning: Become very upset or scared.
  • Example: “She freaked out when she saw the spider.”

Go ape

  • Meaning: Become very excited or crazy.
  • Example: “He went ape when he heard the news.”

Go ballistic

  • Meaning: Very angry or lose control of one’s emotions.
  • Example: “She went ballistic when she found out he cheated on her.”

Go bananas

  • Meaning: Very excited or crazy.
  • Example: “The crowd went bananas when the band came on stage.”

Go berserk

  • Meaning: Very angry or lose control of one’s emotions.
  • Example: “He went berserk when he saw the damage to his car.”

Go bonkers

  • Meaning: Very excited or crazy.
  • Example: “She went bonkers when she won the lottery.”

Go haywire

  • Meaning: To malfunction or become chaotic; to act crazily or unpredictably.
  • Example: “The computer system went haywire and crashed.”

Go postal

  • Meaning: Become extremely angry and violent
  • Example: “The disgruntled employee went postal and started shooting his co-workers.”

Go mental

  • Meaning: Very angry or lose control of one’s emotions.
  • Example: “He went mental when he found out his flight was canceled.”

Go nuts

  • Meaning: Very excited or crazy.
  • Example: “We went nuts when we won the championship.”

Go off the deep end

  • Meaning: Very upset or lose control of one’s emotions.
  • Example: “She went off the deep end when she found out she was pregnant.”

Hit the roof

  • Meaning: Very angry or lose control of one’s emotions.
  • Example: “He hit the roof when he saw the bill.”

Lose it

  • Meaning: Lose control of one’s emotions.
  • Example: “She lost it when she heard the bad news.”

Lose one’s marbles

  • Meaning: To become insane or mentally unstable.
  • Example: “I think my neighbor has lost his marbles, he talks to himself all day.”

Off one’s rocker

  • Meaning: To be mentally unstable or crazy.
  • Example: “The old man down the street is completely off his rocker. He thinks he’s a superhero.”

Pop one’s cork

  • Meaning: Very angry or lose control of one’s emotions.
  • Example: “He popped his cork when he heard the news.”
B2 Knowledge Check · 5 questions

Crazy Idioms — Practice Quiz

1 / 5
Q1

Question 1: What does the idiom 'lose one's marbles' mean?

Question 1 options
'Lose one's marbles' means to become insane or mentally unstable. The other options describe anger or excitement, but this idiom specifically refers to losing one's sanity.
Q2

Question 2: The idiom 'go haywire' is typically used to describe a person becoming very angry at someone.

Question 2 options
This is false. 'Go haywire' means to malfunction or become chaotic, and it is often used for things like machines or systems that stop working properly, not specifically for a person becoming angry at someone.
Q3

Question 3: In which situation would the idiom 'go bananas' be most appropriate?

Question 3 options
'Go bananas' means to become very excited or crazy. A crowd cheering wildly at a concert describes extreme excitement, which fits this idiom perfectly. The other situations describe sadness, calmness, or tiredness.
Q4

Question 4: Match each idiom to its correct meaning.

Question 4 options
Off one's rocker
Blow one's top
Go ballistic
Flip out
To become very angry or excited
To be mentally unstable or crazy
To become very angry or lose control
To lose one's temper

Select an item on the left, then tap its match on the right.

'Off one's rocker' means to be mentally unstable or crazy. 'Blow one's top' means to lose one's temper. 'Go ballistic' means to become very angry or lose control. 'Flip out' means to become very angry or excited.
Q5

Question 5: Complete the idiom: 'He flew off the ___ when he heard the news.'

Question 5 options
The correct idiom is 'fly off the handle,' meaning to suddenly become very angry or lose control of one's emotions. The other words do not complete a recognized English idiom in this structure.

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