Drain the spuds

exp.

Heard in Wicklow, Cork, Tipperary and Kilkenny

A colloquial euphemism for the act of urinating.

In use

I am just goin to drain the spuds, I will be back in a jiffy.

Posh English

I am merely going to relieve my bladder, I shall return in but a moment.

Same phrase, other counties