English to English

noun (n)

• the fleshy part of the human body that you sit on(noun.body)

  Synonym:
  ass, backside, behind, bottom, bum, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end
  

  source: wordnet30
• vulgar slang for anus(noun.body)

  Synonym:
  arsehole, asshole, bunghole
  

  source: wordnet30
• The buttocks, or hind part of an animal; the posteriors; the fundament; the bottom.(noun)

  source: webster1913