trigger-ˌhappy (
also ˈtrigger-ˌready)
adjective informal someone who is trigger-happy is much too willing to use weapons, especially guns:
a trigger-happy cop [TahlilGaran] Dictionary of Contemporary English ▲
trigger happy{adj. phr.} Ready to shoot without warning; fast with a gun.
He's a dangerous criminal quick on the trigger. 2. {informal} Fast at answering questions or solving problems.
In class discussions John is always quick on the trigger.See: QUICK ON THE TRIGGER(1).
[TahlilGaran] English Idioms Dictionary ▲