Dirty Marvin

Usually involves 2 people (male-male female-female male-female) where one person pours vodka into the ass of the other person then proceeds to eat their ass then kiss them. The other person does the same. Repeat as many times as necessary for both people to get drunk

Some variations are the Russian Slow Dance or the Cuban Fudge Tornado

Person 1: hey man wanna do a dirty marvin?
Person 2: what the fuck

Person 1: damn bro I did a dirty Marvin with Edna last night!
Person 2: that’s cool but have you ever tried a Russian Slow Dance?