Buckeye Poke
A penis shaft that is covered in diarrhea, and once pulled out, topped with peanut butter and reinserted into the anal cavity.
Dude, I was railing that chick in the ass last night, she neglected to tell me she had the runs, so I ran and grabbed some peanut butter, put it on the head, and reinserted, thus I gave her the "Buckeye Poke"