The noun buttocks has 1 sense (first 1 from tagged texts)
1. (1) 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?")
Overview of noun buttock
The noun buttock has 1 sense (no senses from tagged texts)
1. buttock, cheek -- (either of the two large fleshy masses of muscular tissue that form the human rump)