Homosexual intercourse. When a gay man puts his unit in his partners ass, you can probably assume it's going to get shit on it.
"Dude, I walked in John's apartment last night and seen his gay room mate shit dicking his boyfriend. I'm scarred for life man!"
by Meaty Pablo April 20, 2008
Using one's dick to push in the shit of another. Primarily used to describe the "male" in a homosexual relationship ; Shit-dick, Shit-dicker, Shit-dicked
"Man that stiltzdaddy has been shit-dicking a TON of dudes lately."
by the guy who beat up your roomy March 09, 2010