Buttocks: Meaning, Anatomy, Grammar, and Sexual Context
Buttocks are the two rounded parts at the back of the lower body, containing muscles and fat that support sitting, balance, movement, and sensation.
Bum: Meaning, British Usage, Anatomy, and Sexual Context
Bum is an informal British English word for the buttocks and may also appear in slang, idioms, insults, and sexual contexts.
Butt: Meaning, Anatomy, Slang, and Sexual Context
Butt is an informal word for the buttocks, the rounded parts at the back of the body that support movement, sitting, and sexual sensation.