Me arse

exp.

Heard in Dublin and Waterford

An expression of emphatic disbelief or denial. Nonsense.

In use

Here' do you xpect me to believe Asprin with the label licked off iz real E. Me arse it is.

Posh English

Do you seriously expect me to believe aspirin with the label removed is genuine ecstasy? My arse it is.

Same phrase, other counties