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English definition of “trigger-happy”

trigger-happy

adjective uk   /ˈtrɪɡ.əˌhæp.i/ us    /-ɚ-/
informal describes someone who often uses his or her gun, shooting with very little reason: Their police are worryingly trigger-happy.Violent or aggressiveUnkind, cruel and unfeelingTreating people or animals badly disapproving ready to use violence or force immediately, without careful thoughtViolent or aggressiveUnkind, cruel and unfeelingTreating people or animals badlyDoing things without fear or proper thought
(Definition of trigger-happy from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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