drop–dead 
/ˈdrɑ:pˈdɛd/ adjective
/ˈdrɑ:pˈdɛd/ adjective informal : very attractive or impressive
▪ a drop-dead evening gown
▪ a drop-dead evening gown
— drop–dead adverb
▪ an actress who is drop-dead gorgeous
▪ an actress who is drop-dead gorgeous
