The act of shaving one's chest before sexual intercourse and getting a Cleveland Steamer. Within the next few days your chest will begin to grow welts and develop hives. If shit shave shingle pain is not treated, puss will start to blowout of large shingle sized bubble growing on your chest. If small shit animals form, call a doctor immediately.
Jimmy'Why are there red bumps on your chest Steve?'
Steve'Ah, yes, it is because Shannon gave me Shit Shave Shingle Pain by shitting on my chest.'
Jimmy'Dumbass nigga.'
This refers to old shops or guilds in the 1800's and before, where their business name was carved on a piece of wood called a shingle, which they would hang out over their front door for pedestrians to see.
"Your sister graduated Law School last week? When will she hang out a shingle?"
As the name suggests, "Holy Shit On A Shingle In The American President's Dick!," Is used to describe a holy piece of shit, blessed by a hooker, stuck on a shingle that was shoved up the American President's Dick hole, with the piece of shit still on the shingle.