NATURAL - In blackjack, a two card hand with 21 points.
In baccarat, a two card hand with total value of 8 or 9, called natural 8 or natural 9 respectively.
NEGATIVE EXPECTATION - The amount of money you expect to lose.
NET WINNINGS - The total payout minus your stake.
NON-NEGOTIABLE CHIPS - Promotional casino chips that cannot be cashed out.
NUMBER POOL - The numbers from which you select those that you want to play.
NUT - A fixed amount that a player decides to win for a day.