Ass may refer to: Ass (animal) or donkey Asinus subgenus American English colloquialism for buttocks (and other derived meanings) Same as arse (British spelling) Áss, the Old Norse for "deity" Ass (album), by Badfinger ASS may stand for: ASS (car), a French car made from 1919 to 1920 ASS (gene), a human gene that encodes for the enzyme argininosuccinate synthetase Acta Sanctae Sedis, a former Roman monthly publication and gazette of the Holy See Advanced SubStation Alpha, a subtitles… (More on Ass)