hindquarters
noun.
the fleshy part of the human body that you sit on
he deserves a good kick in the butt|are you going to sit on your fanny and do nothing?
Synonym: keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, hind end, fundament, arse, ass, backside, behind, bottom, bum, buns, butt, buttocks, can, derriere, fanny, tush
noun.
the part of an animal that corresponds to the human buttocks
Synonym: croup, croupe, rump