blow your top

blow (one's) top

To become very angry, often quickly. Oh man, dad is going to blow his top when he sees that I wrecked his car!
See also: blow, top

blow your top

INFORMAL
If you blow your top, you become very angry with someone and shout at them. I blew my top recently and broke my right hand hitting a dustbin. I never asked personal questions because she'd always blow her top. Compare with blow your stack.
See also: blow, top