Learn more about this word
Crack up
To crack up means to burst out laughing, or to make someone else do so. It works both ways: "I cracked up" and "he cracks me up". Informal and extremely common in speech. Note the separate meaning of a nervous breakdown, judged from context.
Examples in context
She cracked up halfway through the speech.
She cracked up halfway through the speech.
That story cracks me up every time.
That story cracks me up every time.
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