crack up


Definition: Meaning of, crack up in English to English dictionary.

Pronunciation: / krak ʌp /

  • phrasal verb
  • synonym
  • antonym
Word Forms:
Prsesent Past Past Participle
crack up cracked up cracked up
Present Participle Third Person Singular
cracking up cracks up
[informal]
  1. [intransitive] to become mentally ill
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  2. [intransitive] to suddenly laugh a lot at something
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  3. [transitive] crack someone up to make someone laugh a lot
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  4. something is not all it’s cracked up to be used for saying that something is not as good as people say that it is
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