You funnel a full bottle of alcohol (your choice) into your partners butthole. Next you place a cork nice and deep, and instruct them to push. A tornado of sexy warm shit alcohol will spew from their ass, you must catch enough in your mouth to get drunk for it to count.
“Chloe was crazy when she did the Tornado Valley Butt Chug on me!”
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi