Lash

v.

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

1) To rain heavily. 2) To have energetic sexual intercourse. 3) A sudden burst of energy. 4) Abbreviation of slash, meaning to urinate.

In use

..Come on lads, give it a lash.

Posh English

Come along, gentlemen. Let us apply ourselves with great vigour.

Same phrase, other counties