go postal UK /ˌɡəʊ ˈpəʊstl̩/US /ˌɡoʊ ˈpoʊstəl/ verb1 •(US, informal) To become aggressive and erratic, especially due to stress; specifically, to carry out a shooting spree at a workplace environment; also (more generally) to become very angry; to lose one's temper. formswent postal · gone postal · going postal · goes postal
