Arse

n.

1.

The buttocks, or hind part of an animal; the posteriors; the fundament; the bottom.

Noun	1.	arse - 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?" Synonyms: ass, behind, buns, buttocks, hind end, hindquarters, keister, nates, posterior, prat, derriere, fanny, rear end, tooshie, tush, seat, fundament, backside, bottom, butt, rump, stern, tail end, tail, rear, can, bum
	2.	arse - excretory opening at the end of the alimentary canal Synonyms: anus, arsehole, asshole

ass, backside, behind, body, body part, bottom, bum, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, torso, trunk, tush