Wudnt give d steam of their piss

exp.

Heard in Dublin

Exceedingly stingy or selfish to an almost mythical degree.

In use

Jay, yer man is so tight he wudnt give d steam of their piss if you were dyin of thirst!

Posh English

Good heavens, that fellow is so remarkably parsimonious that he would not bestow upon you the very warmth of his own urination!