The act of taking a shit in holy water.
The pastor took an excremental exorcism before bending me over the alter and licking my arse.
The "Deep Sea Dukee " is where you take a shit and your excrement is still within your anus when it makes solid contact with the water below. This act is the most common way to catch skillage.
I think I contracted skillage when I accidentally dropped a deep sea dukee in the public restroom.