mud shower
When a girl, during kinky sexual escapades, decides to lay you down, stand over you and let loose a torrent of diarrhea all over your face.
"The sex started great, until she decided to give me a mud shower"
Egyptian Mud Shower
Different to the standard Mud Shower, this is when a woman inserts milk into their anus and sprays it on one or more people at a distance. Etymology is from the historical reference of Cleopatra bathing in raw milk.
That party last night was awesome! Your sister gave me a massive Egyptian Mud Shower.
Mudding the shower
Smearing shit all over the walls of the shower.
Dude had a tankless toilet so instead of an upper decker, I resorted to mudding the shower.