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crack up

Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson

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crack up

1. to laugh. She was very funny and we cracked up every time she said anything.

2. to become mentally ill. I lost my appetite, became unable to sleep, and worried that I was cracking up.

See also: crack

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``The frames were not supposed to crack up - they were supposed to bend and yield,'' said George M. AREA HOSPITAL SUES WELDING-METAL MAKER by Daily News (Los Angeles, CA) More results

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