[French, behind, from Old French deriere, in back of, from Vulgar Latin *d retr : Latin d, from, of; see de- + Latin retr, back; see retro-.]
Noun 1. derriere - 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?"
arse, ass, behind, buns, buttocks, hind end, hindquarters, keister, nates, posterior, prat, fanny, rear end, tooshie, tush, seat, fundament, backside, bottom, rump, stern, tail end, tail, rear, bum, can, butt