When you have a girl hanging, naked, head down via harness. You then have a male do a hand stand, naked, with his ankles locked with the girls ankles. Then the man does arm squats down and up (speed depends on the males strength) thrusting his penis in and out of the girls vagina while squatting.
Tommy: Dude! Did you hear what John did to Tori yesterday?
Rob: NO, what did they do?
Tommy: John Alaskan Cowbelled the shit out of her!
Rob: Holy Shit! I didn't know John had it in him!
Tommy: Well..... Tori had it in her...