[n] the fleshy part of the human body that you sit on
[v] collide with the rear end of; "The car rear-ended me"
Synonyms
arse, ass, backside, behind, bottom, bum, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rump, seat, stern, tail, tail end, tooshie, tush