One of the two rounded parts of the human body that form the bottom; the rump.
From Middle English 'buttok', possibly related to Old English 'butt' meaning to hit or a protruding part, plus diminutive '-ock'. The word has been in use since at least the 1300s.
English has surprisingly many euphemisms for buttocks—rear end, bottom, derrière, backside—which shows how much we rely on indirect language for body parts, unlike Spanish 'trasero' or French 'fesses' which are more straightforward.
Complete word intelligence in one call. Free tier — 50 lookups/day.