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Definition of crack up phrasal verb from the Oxford Advanced Learner's Dictionary

crack up

phrasal verb
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crack up (informal)
  1. to become ill, either physically or mentally, because of pressure
    • You'll crack up if you carry on working like this.
    • He thought he'd never get through the ordeal without cracking up.
  2. to start laughing a lot
    • He walked in and everyone just cracked up.
crack somebody up
  1. (informal) to make somebody laugh a lot
    • Gill's so funny —she just cracks me up.
See crack up in the Oxford Advanced American Dictionary

Nearby words

trait
noun
 
 
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