Ass

Ass may refer to:

• Ass people (Jasses, Ossetians abnd Burtasses), selfname of Alans (Scytho-Sarmatian tribes)
• Asinus, a subgenus of Equus that includes the donkey and other asses
  • Donkey, Equus africanus asinus
    • By extension, an insult meaning idiot
• North American English informal term for buttocks
• áss, one of the Æsir in Norse mythology
• Ass (album), by Badfinger
• In abstract algebra, Ass(M) denotes the collection of all associated primes of a module M
• AsS, the basic chemical formula for arsenic sulfide

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 editor in computing
• Advisory Service for Squatters, a non-profit group based in London, UK
• Agents of Secret Stuff, a 2010 action comedy film
• American Sociological Society, the founding name for the American Sociological Association
• Angle-Side-Side, an ambiguous proof in mathematics: see Congruence (geometry) - Congruence of triangles
• All-Star Superman, a comic book