Lash

n.

Heard in Down, Cork, Tipperary, Cavan, Dublin and Waterford

A heavy drinking session.

In use

Jaysus I was on the Lash last night and got ma hole and all. Awful head on me the day though.

Posh English

Good heavens, I was on a monumental drinking binge last night and enjoyed amorous congress into the bargain. My poor head feels quite dreadful today however.

Same phrase, other counties