Mouldy

v.

Heard in Westmeath, Cork, Mayo, Galway, Kildare, Carlow, Limerick, Wexford and Longford

Extremely drunk.

In use

Oh I was mouldy last night, must have drank a keg of beer

Posh English

Oh I was exceedingly inebriated last night. I must have consumed an entire keg of beer.

Same phrase, other counties