rump

noun

1. the part of an animal that corresponds to the human buttocks

   noun.animal

   Synonyms croup croupe hindquarters

   Source: WordNet 3.0

2. fleshy hindquarters; behind the loin and above the round

   noun.food

   Source: WordNet 3.0

3. the fleshy part of the human body that you sit on

   noun.body

   Synonyms arse ass backside behind bottom bum buns butt buttocks can derriere fanny fundament hind end hindquarters keister nates posterior prat rear rea

   Source: WordNet 3.0

4. The end of the backbone of an animal, with the parts adjacent; the buttock or buttocks.

   noun

   Source: webster1913