'trigger-happy' definitions:

Definition of 'trigger-happy'

(from WordNet)
adjective
Irresponsible in the use of firearms
adjective
Marked by extreme intensity of emotions or convictions; inclined to react violently; fervid; "fierce loyalty"; "in a tearing rage"; "vehement dislike"; "violent passions" [syn: fierce, tearing, vehement, violent, trigger-happy]