crazy Definition

  • 1mentally deranged, especially as manifested in a wild or aggressive way
  • 2extremely enthusiastic

Using crazy: Examples

Take a moment to familiarize yourself with how "crazy" can be used in various situations through the following examples!

  • Example

    He went crazy and started throwing things around the room.

  • Example

    I'm crazy about this new restaurant.

  • Example

    She's been acting crazy lately.

  • Example

    The idea sounds crazy, but it just might work.

crazy Synonyms and Antonyms

Idioms Using crazy

  • lose control of one's emotions or behavior


    When she heard the news, she went crazy with excitement.

  • completely insane or crazy


    I think my neighbor is crazy as a loon - he talks to himself all the time.

  • be half-crazy

    be somewhat insane or mentally unstable


    After the accident, he was never quite the same - he seemed to be half-crazy.

Phrases with crazy

  • make someone extremely annoyed or frustrated


    The constant noise from the construction site is driving me crazy.

  • being deeply and overwhelmingly in love with someone


    Beyonce's hit song 'Crazy in Love' describes the feeling of being completely infatuated with someone.

  • appearing foolish or strange but actually being very clever or shrewd


    Don't underestimate him - he may seem crazy like a fox, but he knows what he's doing.

Origins of crazy

from Middle English 'craze', meaning 'to shatter'


Summary: crazy in Brief

The term 'crazy' [ˈkreɪzi] refers to mental derangement, often manifested in wild or aggressive behavior. It can also denote extreme enthusiasm, as in 'I'm crazy about this new restaurant.' Phrases like 'drive someone crazy' and idioms like 'crazy as a loon' extend the meaning to describe annoyance or complete insanity. 'Crazy' can also mean cleverness, as in 'crazy like a fox.'

How do native speakers use this expression?