ADJ-GRADED 好动武的;爱动用武器的;爱开枪的;以开枪为乐的 If you describe someone as trigger-happy, you disapprove of them because they are too ready and willing to use violence and weapons, especially guns. 好动武的;爱动用武器的;爱开枪的;以开枪为乐的 [informal, disapproval]
They were gunned down by members of the trigger-happy National Guard…
他们被那些肆意开枪的国民卫队士兵枪杀了。
Some of them are a bit trigger-happy — they'll shoot at anything that moves.