- 1 • informal Suffer an emotional breakdown under pressure: I feel I’m cracking up, always on the verge of tearsMore example sentences
- I was short-tempered and I was cracking up a bit under the pressure of it all.
- ‘If I had not had Diana and the children I would have cracked up and had a mental breakdown by now,’ he said.
- His stylish arthouse flick looks at three women as they crack up.
- 2 • informal Burst into laughter: she tries to keep a straight face, but she keeps cracking upMore example sentences
- He cracks up into laughter, his shoulders heaving uncontrollably.
- I really cracked up in laughter when I read the headline ‘Protest is the backbone of democracy’.
- Before I knew it I was buzzed and cracking up with laughter.
More definitions of crack upDefinition of crack up in:
- The US English dictionary