human gas pipe

A human gas pipe is when two or more people (preferably in a sexual setting) engage in an ass to mouth oriented, human centipedesque configuration whilst performing analingus amidst passing down a chain of gas via ass coughs

Teddy: Is there such thing as “Pink throat”?

Lauren: I’m not sure, why do you ask?
Teddy: Well... Last night those girls I met from PF Chang’s and I had had a wicked Human Gas Pipe goin and I woke up with an itchy, crusty throat this morning...
Lauren: Hmmmm...I think we should call off our wedding until we know for sure just to be safe