Bum chums

n.

Heard in Carlow and Sligo

A derogatory or mocking term for two men whose close friendship is perceived to be romantic or sexual.

In use

Ha ha, why are yee bum chums lads? You have been joined at the hip all evening.

Posh English

Ha ha, pray why are the pair of you inseparable companions? You have been tethered to one another throughout the entire evening.

Same phrase, other counties