Crack up

verb

Definitions

1.verbTo laugh heartily.

"It was hilarious. We were cracking up the whole time."

2.verbTo cause to laugh heartily.

"The joke about the nuns in the bath cracked me up."

3.verbTo become insane; to suffer a mental breakdown.

"She got through the war, but cracked up when her sister died."

4.verb(usually passive, usually negative) To cry up; to extol.

"This new computer system is not what it was cracked up to be."

5.verb(of an aircraft or automobile) To crash.

6.adjectiveFunny; hilarious

"That joke was crack up."

The Daily Word NerdA new word, a puzzle, and a fun fact — free in your inbox every morning.

Free forever · unsubscribe anytime · all 14 newsletters

That email did not go through — please check it and try again.