It is when you are doing someone anally, but the person has a fuckload of shit in their ass so your cock gets covered in it.
It can also be refered to as the choco taco, but i think dog better describes a dick.
OH, yesterday I was fuckin some bitch, and she gave me a haggard-ass choco dog. It was proposterous!
by monsieur mongarious November 21, 2006
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