Idioms for Crazy with Meaning and Examples

Idioms for Crazy

Crazy things can be fun and surprising, and there are special sayings called idioms that describe them. These idioms for crazy use playful and imaginative words to talk about things that are wild, unusual, or very exciting. They are like little word puzzles. For example, ‘barking up the wrong tree’ doesn’t mean a dog barking at a tree, but making a mistake or a wrong guess. These idioms make language more interesting and help us express feelings in a fun way. They’re like splashes of bright paint in a picture, adding excitement and color to the way we talk and write.

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Idioms about Crazy

Idioms about being “crazy” often convey the idea of someone behaving in a way that is unusual, irrational, or extremely enthusiastic. Here are some examples along with their meanings and illustrative examples:

Tilting at windmills

    • Meaning: Attacking imaginary enemies
    • Example: “Arguing about this is like tilting at windmills.”

Around the bend

    • Meaning: Crazy, insane
    • Example: “Staying up all night working is driving her around the bend.”

Running amok

    • Meaning: Behaving wildly
    • Example: “The children were running amok in the playground.”

Jump the shark

    • Meaning: Pass peak, become absurd
    • Example: “The TV show jumped the shark with that ridiculous plot twist.”

Loony bin

    • Meaning: Mental institution
    • Example: “He joked that he’d end up in the loony bin after the stressful week.”

Wild and woolly

    • Meaning: Uncivilized, crazy
    • Example: “It was a wild and woolly party.”

Go bananas

    • Meaning: Become very angry or excited
    • Example: “She’ll go bananas if she sees the house in this mess.”

Off the wall

    • Meaning: Bizarre, unusual
    • Example: “His off-the-wall suggestions often amazed everyone.”

Clown around

    • Meaning: Act playfully
    • Example: “Stop clowning around and get to work!”

Lose one’s marbles

    • Meaning: Go insane
    • Example: “I’m losing my marbles trying to understand this math problem.”

At wit’s end

    • Meaning: Extremely anxious
    • Example: “She was at her wit’s end trying to solve the problem.”

Not playing with a full deck

    • Meaning: Not intelligent or sane
    • Example: “I think he’s not playing with a full deck.”

Crack someone up

    • Meaning: Make laugh
    • Example: “His jokes always crack me up.”

Go off the deep end

    • Meaning: Become very angry
    • Example: “He went off the deep end when he saw the dent in his car.”

Fool’s paradise

    • Meaning: False happiness
    • Example: “Believing that job will be easy is living in a fool’s paradise.”

Have a screw loose

    • Meaning: Be slightly insane
    • Example: “I think he has a screw loose, judging by his actions.”


    • Meaning: Silly, crazy
    • Example: “She has some wacky ideas about how to run the office.”

Out of one’s mind

    • Meaning: Insane, irrational
    • Example: “You’re out of your mind if you think that’s a good idea.”

Nutty as a fruitcake

    • Meaning: Very eccentric
    • Example: “He’s as nutty as a fruitcake but quite harmless.”


    • Meaning: Crazy, mad
    • Example: “The idea seemed completely bonkers.”

Up the pole

    • Meaning: Confused, crazy
    • Example: “He’s gone up the pole with his latest conspiracy theories.”

Mad as a hatter

    • Meaning: Completely crazy
    • Example: “He’s as mad as a hatter, but he’s a genius.”

Off one’s trolley

    • Meaning: Insane, crazy
    • Example: “He must be off his trolley to hike in this weather.”

All balled up

    • Meaning: Confused, crazy
    • Example: “I get all balled up when I try to speak another language.”

Off one’s rocker

    • Meaning: Insane, crazy
    • Example: “You must be off your rocker to go swimming in this weather!”

Stark raving mad

    • Meaning: Extremely irrational
    • Example: “He was stark raving mad after hearing the news.”


    • Meaning: Crazy, eccentric
    • Example: “His whacky inventions never cease to amaze.”

Bats in the belfry

    • Meaning: Eccentric, crazy
    • Example: “He’s got bats in the belfry if he thinks that plan will work.”


    • Meaning: Crazy
    • Example: “That plan is absolutely cuckoo.”

Fool’s errand

    • Meaning: Pointless task
    • Example: “Sending him for a skyhook was a fool’s errand.”

These idioms use colorful language to describe different levels and forms of irrational or unconventional behavior, often with a touch of humor.

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