Grunskin

(Noun) The skin between your testicles and your anus.

I love to powder my grunskin after shaving. Rub the Grunskin and make a wish.

by jhoff194 July 13, 2010

Flumpkin

Is when a man is taking a dump and a woman is sucking his testicles and he suddenly drops a heavy shit in the toilet and water splashes on her chin and on his grunskin.

While I was in the bathroom I gave my girl a flumpkin.

by jhoff194 July 14, 2010