What does crack up mean?

Looking for the meaning or definition of the word crack up? Here's what it means.

Verb (idiomatic, intransitive) To laugh heartily. (idiomatic, transitive) To cause to laugh heartily. (intransitive, idiomatic) To become insane; to suffer a mental breakdown. (transitive, informal, now usually passive) To cry up; to extol. Find more words! 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His stylish arthouse flick looks at three women as they crack up. Each member of the family takes a turn as the centre of attention and tries to make someone else crack up. I could tell the elder student wanted to crack up in laughter about then, but prevented himself from doing so with a mere smile. All it takes is for one person to crack up and we all collapse. Everyone at TP1 knows that if you're looking for someone to crack up at your jokes, you come see us-the women in the design department. See Also What is another word for crack up? What is the opposite of crack up? Sentences with the word crack up Words that rhyme with crack up What is the past tense of crack up? Nearby Definitions crackup cracktros cracktro crack trains crack train crack through crackups crack willow crack willows crack wise cracky cracky wagon