Definitions for "Free Odds"
Keywords:  odds, casino, wager, vigorish, don
These are the odds offered which vary from casino to casino. Usually expressed as "Double Odds", 3X, 4X, 5X, 10X, or even as high as 100X.
Bets placed on the realistic odds which have pass and come bets.
If you bet $20 on the Pass Line, Don’t Pass, Come, or Don’t Come, you can increase your original bet by the double the amount of your free odds after the dice have been thrown - to wager behind. To wager behind is what a good craps player will do and a criteria of good craps games is how many free odds the casino offers you. As the amount of allowed odds increases, the house advantage decreases considerably.