off with someone's head UK /ˈɒf wɪð ˈsʌmwənz ˈhɛd/US /ˈɔf wɪθ ˈsʌmwənz ˈhɛd/ phrase1 •(humorous) Used to express a desire to kill the person in question.Some nerve! Off with their heads! shouted the master of ceremonies with mock ferocity, while the audience laughed.
