Penoral defication- is a socially accepted form of pissing.
The word comes from the
catholic edited version of the Second testament - Roman
soldier to Jesus of Nazareth:"gonna cry? gonna piss your pants
maybe? maybe shit and cum?"
Because of vulgarity of the word "piss" theologicians with the help of "minor" assistants came up with the given phrase.
Uncle Balthazar: Hey little Jimmy! Do you want know what Penoral Defication is?
Jimmy in a wheelchair: *drooling*
Uncle Balthazar: *unzips pants* Well you came to the
right place! *starts pissing*