"rumps" in the noun sense
1. hindquarters, croup, croupe, rump
the part of an animal that corresponds to the human buttocks
2. rump
fleshy hindquarters behind the loin and above the round
3. buttocks, nates, 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
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?"
Source: WordNet® (An amazing lexical database of English)
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