Mouldy

v.

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

Extremely drunk, to the point of being all over the place.

In use

He was mouldy drunk last night

Posh English

He was thoroughly inebriated and quite scattered last night.

Same phrase, other counties