Close cousin to the highly acclaimed and practiced Dirty Sanchez, this maneuver, usually made during doggy style sex, involves putting your
finger in your own
ass before wiping it across your partner's upper lip, creating an authentic looking mexican moustache. Presumably you would use this technique when your partner's
ass is too
well cleaned, or it's already full of your cock. Bonus points for getting a whole fast food order out before your partner gets their lip cleaned off.