a sexual phenomena involving a very precise process which first involves a girl on all fours... naked of course... on a treadmill that is turned off. You then stand behind the treadmill waiting... naked of course... as the girl proceeds to turn the treadmill on full speed, launching herself into you... BOOM!
Ben's Sister: "Hey my face is starting to hurt from the Phillipino Flapjack. do you think we could try something else?"
Willy Pete: "Yea bend over on that treadmill real quick I'll show you the dirty dady Transiberian Treadmill"