To wolf a gnarley. In the sense of a sexual act such as busting a nut, blowing a load, or even having a bowel movement, etc...
Batman! I think I just wolfed a gnarley
Hey baby, how bout we call it a night and wolf some gnarley
Where's the shitter
? I'm gonna' wolf a gnarley!
So how much would it cost for you to wolf my gnarley