Definitions of crack-up
  1. noun
    a mental or physical breakdown
    synonyms: breakdown
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    nervous breakdown
    a severe or incapacitating emotional disorder
    nervous exhaustion, nervous prostration
    an emotional disorder that leaves you exhausted and unable to work
    nervous breakdown (not in technical use)
    type of:
    collapse, prostration
    an abrupt failure of function or complete physical exhaustion
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