Barse
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.
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.
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.