Giv't a lash

v.

Heard in Tipperary

To make an attempt at a task, often with a sense of reckless optimism.

In use

Ah sure, I haven't a clue how to fix the engine, but I might as well giv't a lash anyway.

Posh English

I confess I possess no knowledge regarding the repair of this motor, yet I shall attempt the task with great vigour nonetheless.