This is what I got from ask.com-
The official definition of Sklansky Bucks is as follows:
"Sklansky bucks are theoretical money won or lost based on the Fundamental Theorem of Poker. The FTOP is discussed in The Theory of Poker.
Basically, if you lose a hand but your opponent made mistakes, such as drawing to a flush without proper pot odds
, you may lose the pot but you have earned Sklansky bucks by causing your opponent to make a mistake.
On the flip side. If you are drawing without odds but you get luck and draw out on your opponent, you win the pot, but you lose Sklansky bucks."