When you take a dump on their face, bust a nut, and then smoothen the surface with your testicles four times over to create a smooth driving surface
My girlfriend was feeling freaky and begged for a Hot Karl, but I suggested a "Michigan Steamroller." She agreed and I indulged in these wild pleasures
The act of shitting on your partners chest, covering it with seran wrap, sitting on it smearing it all over his/her body without getting it on yourself.