that's the name we used for "pill pool" in the poolhall i frequented when growing up. basically you dish out two pills from the bottle to each player. they keep one pill which is their secret money ball. the other they hand in and is used to determine the break order. once someone makes their secret money ball, the game is over, they collect X dollars from each other participant and the balls are re-racked, the pills put back in the bottle, shook up, then redistributed and you do it all over again. and the ball that was the winning ball from the previous game is put in the middle and its now the bonus ball and worth 2X. so if you get that pill you want to keep it.
this has always been one of my favorite games to play because the money is thrown around at such a quick pace.