Noun | 1. | buns - 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?"Synonyms: arse, ass, behind, buttocks, derriere, fanny, hind end, hindquarters, keister, nates, posterior, prat, rear end, tooshie, tush, seat, fundament, backside, bottom, stern, rump, butt, tail end, tail, rear, bum, can |