have a quick temper
A tendency to become angered, enraged, or upset very quickly or easily. I'm usually a pretty calm person, but whenever I start driving I find I have such a quick temper.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
have a quick ˈtemperbecome angry easily: Just be careful how you tell him — he’s got a very quick temper and he’s quite scary when he’s angry! ▶ ˌquick-ˈtempered adj.: She’s quite a quick-tempered woman.
Farlex Partner Idioms Dictionary © Farlex 2017