From WordNet (r) 2.0 (August 2003) [wn]:
hindquarters
n 1: 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?" [syn: buttocks,
nates, arse, butt, backside, bum, buns,
can, fundament, hind end, keister, posterior,
prat, rear, rear end, rump, stern, seat,
tail, tail end, tooshie, tush, bottom,
behind, derriere, fanny, ass]
2: the part of a quadruped that corresponds to the human
buttocks [syn: croup, croupe, rump]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
hindquarters \hindquarters\ n.
1. the fleshy part of the human body at the back of the hip,
on which a person sits; teh buttocks.
Syn: buttocks, arse, butt, backside, bum, buns, can,
fundament, hind end, keister, posterior, prat, rear,
rear end, rump, stern, seat, tail, tail end, tooshie,
tush, bottom, behind, derriere, fanny, ass.
[WordNet 1.5]
2. the part of a quadruped that corresponds to the human
buttocks.
Syn: croup, croupe, rump.
[WordNet 1.5]