tolerance of a mousetrap

A term used to describe a person or creature with no patience or tolerance. Someone who snaps easily.

Bob: You wanna get something to eat man?
Larry: Sure. Not McDonald's though. I had that yesterday.
Bob: GOD DAMN IT LARRY! WHY CANT YOU EVER EAT WHERE I WANT TO!?
Larry: Jeez man. You've got the tolerance of a mousetrap.