disapproval 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. Some of them are a bit trigger-happy -- they'll shoot at anything that moves. someone who is trigger-happy is much too willing to use weapons, especially guns
ready to shoot a firearm at the slightest provocation, tending to use a gun without thinking carefully; having a tendency to respond in a violent manner, recklessly impulsive