• the British/Irish-English vulgarism for the buttocks
  Buttocks
  The buttocks are two rounded portions of the anatomy, located on the posterior of the pelvic region of apes and humans, and many other bipeds or quadrupeds, and comprise a layer of fat superimposed on the gluteus maximus and gluteus medius muscles. Physiologically, the buttocks enable weight to...
  
  , equivalent to "ass" in American or Canadian English
  • "arsehole," a similar British/Irish term for the anus
    Anus
    The anus is an opening at the opposite end of an animal's digestive tract from the mouth. Its function is to control the expulsion of feces, unwanted semi-solid matter produced during digestion, which, depending on the type of animal, may be one or more of: matter which the animal cannot digest,...
    
    , equivalent to "asshole" in American or Canadian English
• Arylsulfatase E
  Arylsulfatase E
  Arylsulfatase E also known as ARSE is an enzyme that, in humans, is encoded by the ARSE gene.- Function :Arylsulfatase E is a member of the arylsulfatase subfamily of sulfatase enzymes that catalyze the hydrolysis of sulfate esters. It is glycosylated postranslationally and localized to the golgi...
  
  , an arylsulfatase gene; deficiencies of it are associated with X-linked recessive chondrodysplasia punctata
• Animal Research - Scientific and Experimental, a fictional animal research centre in the book The Plague Dogs
  The Plague Dogs
  The Plague Dogs is the third novel by Richard Adams, author of Watership Down, about two dogs who escape an animal testing facility and are subsequently pursued by both the government and the media...
  
  .
• Seigneurie d'Arse, a French wine from the Fitou region.

See also

• ARSS, the US Government's prototype Autonomous Rotorcraft Sniper System
• The Army Rumour Service
  The Army Rumour Service
  The Army Rumour Service is an unofficial British Army website and forum. Known colloquially as ARRSE - from "ARmy Rumour SErvice" - the site styles itself as the unofficial voice of the British Army...
  
   (ARRSE), an unofficial British Army website and forum
• Ass
  Ass
  Ass may refer to:* The mammal Equus africanus asinus better known as the Donkey** Asinus subgenus* North American English informal term for buttocks* áss, one of the Æsir in Norse mythology* Ass , by Badfinger...
  
  , North American English equivalent