In town people would stop and say to me, “Hey Becky, that cat story was crack up.”

One person said it was "crack up", while the woman who uploaded it said "I'm a do it again (sic)".

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

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

The joy of “Ticket to Paradise” comes not from its predictable plotting or razor-thin screenplay; it’s from watching them together, from observing how the sparks still fly, and (when the former flames get drunk and let their guards down, or during the end-credit outtakes) watching them crack each other up.

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

All rather inhuman and undernourished, isn’t it? Well, that, children, is the true sign of cracking up.

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.

When I reported this to Burwell by telephone, he called me a Chinese ace — in those days Chinese aces were pilots who cracked up their own airplanes […]

Crack up

Meaning

Verb

Adj