Green’s Dictionary of Slang

(Irish) a dismissive retort, lit. ‘kiss my arse’.

[1922		Joyce Ulysses 174: Pogue mahone! Acushla machree! It's destroyed we are from this day! It's destroyed we are surely!].
1985		Spin Dec. 32/3: A place where dreams are bordered by brackish canals [...] and drunks scream "pogue mahone" ("kiss my ass") at one another in loud, rowdy pubs.
2001		G. Coughlan Everyday Eng. and Sl. 🌐 Pogue Mahone (phr): kiss my arse.
2006		T.P. Dolan Dict. Hiberno-Eng. 179: I got a letter from her this morning and she said that she has taught them all to say pogue mahone [pog mo thoin, kiss my backside]. They think it's Irish for good morning.
2009		G. Suture Asphyxia 59: ‘Pogue mahone!’ She fled towards her mother’s house.