There are two definitions of the word Nut, when used in gambling circles. Nut can often be referred to as the total amount it costs to run any type of gambling venue such as a casino.
Another definition for the word Nut is the amount that any gambler is aiming to win on any gambling session they are about to take part in. Many gamblers will have their own unique gambling strategy on which they will have their own unique winning goal.
The best type of strategy is one which will see a gambling aiming to increase their bankroll through a series of winning outcomes on whatever gambling activity they are taking part in, however the lower the percentage increase they are aiming to win the more likely they are to achieve that winning goal or Nut.
Part of that strategy will see gamblers placing often very low risk bets and wagers, and they will also have something known as a stop loss limit, which is going to see them ending any gambling session when their accumulative losses on that session has reached a certain value, which once again will be a percentage of their initial starting bankroll.