Dung Piping

The act of having anal sex, especially in a shitty asshole that has not been cleaned. Ever.

Man 1: So what happened to that skank you met at the club last night?
Man 2: I took her around to the alley we were totally Dung Piping for a couple hours. I had to take eight showers when I got home!
Man 1: Gross. Why do you tell me this shit?