crack up

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

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

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

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

From all directions they came to the rescue, one predominant fear gripping their hearts: Fire! Someone had cracked-up. It was for this they sped. The flames that so frequently burst from a crashed airplane became an instantaneous cauldron; many a pilot has lived through the crash to die in the fire that followed.