Arse-piece, can be used as and alternative to arsehole or asshole. The word originated from deep in the heart of Glasgow. Although its specific origin is still unknown, arse-piece is believed to have descended from the word ring piece, and is used as a term to refer to someone annoying or pesky.
Malcy: Haw! Arse-piece, yer baws are oan fire!
Georgie: Ta sherlock!
Malcolm: You there! Arse-piece, your testicles are alight!