arse

Arse is a British English and Hiberno-English term or vulgarism for the buttocks, equivalent to the American English "ass"
Old English ærs, ears, from Proto-Germanic arsaz.

Cognate with German Arsch.

Ultimately from Proto-Indo-European orse (“backside, buttocks”)

Arse over tit beats head over heels any day!

by goblob March 09, 2011