mugger UK /ˈmʌɡə/US /ˈmʌɡɚ/noun 3forms 1phrases 1 noun3 •A person who assaults and robs others, especially in a public place. •A large crocodile, Crocodylus palustris, of southwest Asia, having a very broad wrinkled snout. •A person who makes exaggerated faces, as a performance; a gurner. formsmuggers Phrases with mugger charity muggerA person employed by a charity, or by an intermediary fundraising agency employed by the charity, who stands in the street and invites passersby to set up standing orders or direct debits to make regular donations to the charity.