n. pl. the fleshy part of the human body at the back of the hip, on which a person sits.
Syn. -- arse, butt, backside, bum, buns, can, fundament, hindquarters, hind end, keister, posterior, prat, rear, rear end, rump, stern, seat, tail, tail end, tooshie, tush, bottom, behind, derriere, fanny, ass. [ WordNet 1.5 ]