Green’s Dictionary of Slang

arse-wiper n.

a sycophant.

1922		Joyce Ulysses 434: Hello, seventyseven eightfour. Hello. Freeman’s Urinal and Weekly Arsewiper here 1 hour.
1967		M. Frayn Towards the End of Morning (2000) 9: I’m not your wet nurse, you know. I’m not your private arse-wiper. Try and use a bit of initiative, sonny!
2006		M. L’anglais My Enemies’ Enemies 134: Guyon you bloody idiot, the President's right-hand arse wiper.
2012		M. Cumney Galore [ebook] A milksop and a zealot, a shameless bootlicker whose grandest ambition was to be appointed arsewiper to His Holiness the Pope.
2013		P. Morris Bad City 273: He was a professional, possibly even one of a kind: the prime arse wiper.