chorus and verse; chorus noun the posterior, the backside UK Glasgow rhyming slang (reliant on the local accent) for ARSE.
Are ye corned beef [deaf]? I said sit doon on yer chorus and we’ll have a wee Salvador [drink]. Mine’s a Mick Jagger [lager] by the way. — Guardian, 29 April 2002
She was no angel, either, the way she worked her chorus. — Bodmin Dark, DirtyCockneyRhymingSlang, 2003