carcassEnglishOxford American Thesauruscarcass noun 1 a lamb carcass: corpse, cadaver, dead body, body, remains, skeleton, relics; informal stiff; archaic corse. 2 informal move your carcass from the seat: body, person, self; backside; North American, informal butt; British, vulgar slang arse; North American, vulgar slang ass.