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1.
Used when somebody else is or may be fucking with you.
Joe: "Bro where's the cheesecake?"
Jamal: "Gone."
Joe: "Are you shitting on my dick?"
Jamal: "No dude."

Doctor: "It appears you have stage 9 cancer and will probably die soon."
Patient: "Seriously?"
Doctor: "Naw just shitting on your dick."
by Yoman1289 April 23, 2011