crack up Rate this phrase:(3.00 / 1 vote)
To become insane; to suffer a mental breakdown.

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

Additional definitions for 'crack up':

crack upTo laugh heartily.
crack upTo cause to laugh heartily.
See them all »


Find a translation for the crack up phrase in other languages:

Select another language:

Nearby phrases

Some more phrases from our dictionary similiar to crack up

Discuss this crack up phrase with the community:


Use the citation below to add this crack up definition to your bibliography:


"crack up." STANDS4 LLC, 2018. Web. 17 Aug. 2018. <>.

We need you!

Help us build the largest human-edited phrases collection on the web!

Thanks for your vote! We truly appreciate your support.