N - Poker Dictionary
As you might guess, any game in which there is no limit on the sizes of bets and raises. Note that in table stakes games, players are still limited to the amount of money they have in front of them.
The nuts is the best possible hand. This makes most sense in flop games like hold'em, where the community cards make the nuts pretty much the same for everyone. An exception is when your hole cards make a better hand impossible. If the board is AAK52, the nuts would be AA to an observer, but a player with AK would effectively hold the nuts (assuming the 2 and 5 didn't share a suit with one of the A's). In hold'em, the nuts is never less than trips. "Nut xxx" is used to refer to the best hand of a particular type, especially a straight or flush. If the table described above had the AK2 of spades, the nut flush would be the queen and any other spade.