When an overweight man or woman deliberately refrains from wiping their ass, and sits on the face of a consenting or non-consenting individual, giving said individual the appearance of having long, shitty mutton-chop sideburns
Guy 1 (Submissive): Make sure you perch right, lest the middle of my face get covered in shit
Guy 2 (Dominant): Don't worry. I've done Mississippi Mutton Chops before