buttocks
1. [ noun ] the fleshy part of the human body that you sit on
Synonyms: seat ass bottom behind tail rear_end hindquarters hind_end bum keister posterior buns butt prat stern rear can tail_end tooshie tush rump fundament derriere fanny backside nates arse
Examples:

"he deserves a good kick in the butt" "are you going to sit on your fanny and do nothing?"

Related terms: body_part torso
Similar spelling:   buttock
  butch
  Butts