You take all of the ingredients for a margarita, put them into a girls butt-hole, then shake her around (preferably smack her around) so the ingredients are mixed, then suck the "anal margarita" out of her anus. The key is to suck it out, as if your mouth were a human vacuum. Inhale the juices from her b-hole and you've got yourself a nice, fine, anal margarita. Enjoy it and pass on the recipe to all of your friends.
ADVICE - This is great for potlucks and birthday parties. Fact.
John: I'm guessing it has to do with that hot new craze everyones been raving about, aka, the "anal margarita?"
Joe: Of course man!! Me and Jenny made some amaaaazing Anal Margarita's last night.
John: Dude... I'm so jealous..
Joe: Hey man don't worry, me and you can make a few with each other right now. I have some left over ingredients.
John: You sure? I mean, I don't want to make you...
Joe: No, I'd love to.
John: I love you...
Joe: I love you too... sweet prince..
John: Would it be weird if I kissed you right now?
Joe: Not at all, I was thinking the same thing.