crack up

Definitions of crack up
  1. verb
    laugh unrestrainedly
    synonyms: break up
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    type of:
    express joy, express mirth, laugh
    produce laughter
  2. verb
    suffer a nervous breakdown
    synonyms: break up, collapse, crack, crock up
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    type of:
    get, have, suffer, sustain
    undergo (as of injuries and illnesses)
  3. verb
    rhapsodize about
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    type of:
    exalt, extol, glorify, laud, proclaim
    praise, glorify, or honor
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