crack up
Intermediate (B1) informal
To start laughing really hard, or to stop working properly in your mind.
"She cracked up when he tripped over the garden hose."
Hear it in context
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Typical Gamer · 119:01
Crack up.
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Adam’s English Lessons · engVid · 6:25
Okay, so then "crack up".
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Lateral with Tom Scott · 4:22
(guests crack up) That's hilarious.
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Charisma on Command · 2:59
people laughing can make you crack up
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Learn English With TV Series · 2:38
But I did crack up in tears.