As mentioned in the movie "Harol & Kumar go to White Castle".
1)When two males have sex with a female simeltaiously with no discepency on which orifice they chose to perfom the action in.
2)When two dudes bang a chick at the same time.
(EX.1)I'll pok'er in the front and you can bang her in the rear.
Girl: Give me the double staff.
Boy A: i dont quit follow...
Boy B: huh?
Girl: I want both of you in me at the same time.
Boy A: One hole or two?
Girl: Dosent matter.