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Having anal sex with an unclean ass.
Upon completion, one finds a turd atop his penis. This act is directly responsible for the "Dirty Sanchez".
"Man, that fat bitch I was fuckin got me all shit shingled."
by Sskid January 17, 2005
its when you let out a crap and its in the shape of a rectangle, hard and crusty
i found a shit shingle on my pillow last night
by KC roller biatch March 29, 2004