While having sex, the girl hangs over the edge of the bed until she is basically standing on her head. Then the man, while on his knees on the bed, begins to ram her hard. While doing this, he is leaning forward and making arm motions and "koosh" sounds as if skiing in the klondike. Really skanky thing to do.
I really want to go skiing, but since it's July, I'll have to settle for the Klondike Koosh.