Similar to the Bowling Ball (two fingers in the pink, thumb in the stink in bowling grip motion) the difference is body positioning (two fingers in the stink, one in the pink) see Justin Surprise
"Hey Maryah, Justin gave me a Reverse Bowling Ball last night" said Nancy. "You mean two in the pink and one in the stink using the bowling ball grip" asked Maryah. "No! I'm talking about two in the stink and one in the pink using the bowling ball grip! It was incredible!" replied Nancy
by Justin Trompczynski November 11, 2011