panic button
noun [ C usually singular ] uk/ˈpæn.ɪk ˌbʌt.ən/ us/ˈpæn.ɪk ˌbʌt̬.ən/
报警按钮，紧急呼救按钮
a device, usually a button, that is used to call for help by someone in a dangerous situation
Idiom
hit/press/push the panic buttonidiom 仓促行事，慌乱行事，惊慌失措
to do something quickly without thinking about it in order to deal with a difficult or worrying situation