Barse

n.

Heard in Waterford, Cork and Mayo

The area between a mans testicles and anus. Derived from a combination of the words balls and arse, hence barse.

In use

I cycled up seskin hill and by de time I got to the top me barse was as red raw as a steak on a wet barbeque.

Posh English

I cycled up Seskin Hill and by the summit the territory between my gentleman's walnuts and my posterior was as raw as a steak upon a damp barbecue.

Same phrase, other counties