- (Template loop detected: Template:context 1) To laugh heartily.
- It was hilarious. We were cracking up the whole time.
- (Template loop detected: Template:context 1) To cause to laugh heartily
- The joke about the nuns in the bath cracked me up.
- (idiomatic) To lose clarity in a long-distance conversation due to bad reception.
- I can't hear you, the reception's bad, you're cracking up.