Sex act for those into coprophilia, brown showers or scat play in general. A male defecates/shits into their partners mouth, then while that person holds the still hot shit in their open mouth, the shitter turns around and face-fucks them - pushing the shit both out of their mouth and onto their face and also down their throat. The cock is the plunger for the toilet mouth.

when you're hungover as shit after a spending a night drunk as a skunk