Action The action is on a player when it is that player's turn to play. Also, lots of betting activity is said to have lots of action.
Add-on Some tournaments allow all players, regardless of chip count, to perform one add-on. An add-on is an opportunity to buy additional chips and typically happens at the end of the rebuy period.
Aggressive Describes a player that bets and raises more then the average player. All players can be classified anywhere between aggressive and passive.
AI AI stands for Artificial Intelligence, otherwise known as computer AI. The computer AI is the intelligence computer program behind the decisions made by the different computer player types.
All-in Betting all remaining chips. In table stakes games like No Limit Texas Hold'em, a player may not go into his pocket for more money unless it is during a rebuy or add-on. When a player is all-in, a side pot is created for other players' bets that the original player cannot match. The all-in player cannot win the side pot; however, the all-in player can still win the main pot.
Ante A small bet contributed by each player to seed the pot at the beginning of a poker hand. Most Texas Hold'em games do not have an ante; they use rotating blinds to get initial money into the pot.
Bet To make a wager on a betting round (as opposed to an ante). The first person to make a wager in a round will be the only one to make a bet, every other player must then call or raise your bet.
Big Blind A forced bet, typically two positions left of the dealer button, placed before any cards are dealt. The big blind is approximately twice the amount of the small blind.
Big Slick An Ace King for your hole cards.
Bluff A bet intended to represent a hand better, or different, than you actually have.
Board Cards The five cards in the center of the table which include the flop, turn, and river. Otherwise known as community cards.
Bubble The last player out in a standard tournament before a prize-winning spot. In a satellite tournament, all the finishers all receive the same prize, an entry into the next "big tournament", and the bubble is the person whom doesn't receive the full prize, but receives what is left over due to rebuys and add-ons.
Bully Short Stacks This is an AI settings that changes how likely the AI will bully a short stack. When a player is short stacked, they are forced either fold or go all in on the best hand they can get. If you bully them by raising and putting them all in, they are forced to fold with mediocre hands, this is especially effective when the short stack is on the big blind. A player should bully the short stack when a loss will not affect your tournament standings.
Burn Card A burn card is discarded into the muck once before the flop, once before the turn, and once before river cards are turned over. DD Poker does this "under the covers", meaning a card is burnt but the action is not displayed.
Busted Out You have bet all your chips, and are out of the remainder of the tournament. If you have finished in the top finishers within the payout structure then you still have placed "In the money".
The button, or dealer button, is a small acrylic disk marked "Dealer" or "D" in DD Poker that is used to simulate a rotating house dealer. The player to the left of the button is first to act and is also typically the small blind. The player on the button is in the last position.
Buy-in The amount of money to enter the tournament.
Call To match the previous bet rather than raise.
Chaser AI player type. The chaser player type will stay in a hand "chasing" after incomplete Straights, Flushes and Full houses. This person will lose 2 out of 3 times on average for these hands.
Chasing AI adjustment. Controls how likely the AI will stay in a hand "chasing" after drawing hands like , Straights, Flushes, Full houses, etc.
Check Placing no bet when it is your turn to act in the betting round. The check option may only be taken when no player before you has placed a bet. If a player after you in the betting round places a bet, you will have the option to call or raise.
Check Raise To raise after checking earlier in the round.
Chip Race During color-up, players are dealt a card for each odd chip (where there is an insufficient quantity to change up to the next chip denomination). The players with the highest cards win an extra chip, maximum of one chip per player.
Color-up Removing the lowest denomination chips at the table by exchanging them for chips of higher value. This activity is performed when the lowest denomination chip is no longer needed for the blind structure. 
Community Cards The five cards in the center of the table which include the flop, turn, and river. Otherwise know as board cards.
Connectors Two cards next to each other in rand, such as 8-9. If they are also the same suit, they are called Suited Connectors.
Drawing Hand An incomplete hand that needs one card to make a straight, flush, or straight flush.
EV Expected value is the average amount of big bets one should expect to make correctly playing a particular hand. Playing for EV means making decisions that should result in receiving that many chips per hand in the long run.
Fifth Street The fifth and last community card placed face-up by the dealer and the final round of betting.  Also known as the River.
Fish An AI player type. A fish is a nickname given to an amateur player that plays poorly and loses a lot of money.
Flop The first three community cards that are dealt face up at the same time and the second round of betting.
Fourth Street The forth community card placed face-up by the dealer and the third round of betting.  Also known as the Turn.
Gutshot Having four-fifths of a straight, with the missing card being between two others. A gutshot is a straight with one interior gap which would complete the straight, such as 4-6-7-8. Also called an inside straight.
Heads-up A game or pot with only two players remaining.
Hole Cards These are the first two cards dealt face down to each player.  In DD Poker, your hole cards are dealt face up for easy viewing on the computer screen; you can use the Hole Cards Face Down setting to deal them face down. This is good practice for real poker tournaments because it helps you practice memorizing your cards.
K Represents a thousand dollars in the chip count.  Example:  $1K is equal to $1,000 and $10K is equal to $10,000.
Kicker If two or more players have the same hand, the highest unpaired side card (or kicker) determines the winner. Kickers only apply to four-of-a-kind, three-of-a-kind, two pair, one pair and high card situations.
Limit A minimum or maximum amount to the allowed bets. A no-limit tournament has no maximum bets.
Limper A Limper is the kind of player who will only bet the minimum amount to see the flop. This is called "limping in". Most Limpers will pay to see the flop then end up folding if the betting gets stronger. What is nice about playing Limpers, is that they increase the pot without posing much of a threat since they will usually give up on their less-than-monster hands.
Limping In To call the blinds before the flop, or to make a similar call on a later round. Limping suggests weakness, and is done by hands that need to see the flop, or slow-players that are trying to keep players in the pot.
Loose Describes a player that plays more hands then the average player and inevitably is involved in more pots. A loose player will many times will call the starting hands to at least see the flop. All players can be classified anywhere between Loose and Tight. How tight a player is playing should not to be confused with their aggressiveness or player type (i.e. Fish, Maniac, Rock, etc.).
Maniac A maniac is a nickname given to a player that plays loose and very aggressive. They will be in for more pots, raise aggressively, and call a lot.
Muck The pile of folded and burned cards in front of the dealer.

Note:  To maximize space on the screen, the muck is tracked but not displayed. To accurately simulate a real game, DD Poker burns (or discards) the top card behind the scenes before the Flop, Turn and River. Once a card is folded or burned, it is not used again until the next hand.
Mucked Hands A mucked hand is a hand that went to the showdown, and folded after the winning hand was revealed before them. The muck is the pile of folded and burned cards in front of the dealer. A player has the choice of not revealing their losing cards, or "mucking" them at the showdown if the player before them shows a winning hand they know beats theirs. Turn the Show Mucked Hands option ON if you wish to see the computer's mucked hands.
Nut(s) The best possible hand, given the cards in sight. It's been said that this term came from betting the wagon wheel nuts. Rumor has it, long ago players would remove a wagon wheel and put the nuts into his pocket so that his wagon would still be there when he returned from his gambling session. Risking the wagon wheel "nuts" in a game meant there was no way he could lose, so he could risk his transportation home.
Off-suit Hole cards that are not the same suit.
Outs The number of Outs are the number of cards left in the deck that could yet be turned over on the board that could improve your hand to the best hand. Example: If you are in an all-in showdown on the river with a player with 3 queens, if there is no chance for a straight or flush and you have two kings, then the number of outs are 2 because there are two kings left that could be turned over.
Outside Straight Having four consecutive cards to a straight, such as 4-5-6-7. It's an outside straight because two ranks of cards can complete the straight, compared to only one with an inside straight.
Overbet An overbet occurs when a player goes all-in and is called by someone with fewer chips.  The blue placard with the arrow is used to indicate that a player lost the pot, but was returned the extra amount (or overbet) after the showdown. If the player who overbet wins the hand, then the extra amount is included in the amount won and displayed using the green placard.
Passive Describes a player who does not bet or raise a lot of money, also known as a weak player. All players can be classified anywhere between aggressive and passive.
Pot Odds The amount of money in the pot versus the amount of money it will cost you to call the hand. For example if there is $200 in the pot and you have a $40 bet to call, you are getting 200 to 40 (or 5 to 1) pot odds. The larger the pot odds, the more worth while it is for you to call even with mediocre hands because your potential gain is much higher then your call.

It is often valuable to evaluate the amount in the pot when deciding whether or not to call a bet. In a game with a large amount in the pot, even a mediocre hand with a small chance of improvement may be worthwhile to call. If the pot is small, even a fairly good hand may not be worth a call because the amount of risk (the bet) is too large relative to the potential gain (the pot).

If there is a bet that you may call, the pot odds are displayed both as odds (N to 1) and a percentage. One concept in poker is that it is sometimes appropriate to stay in the hand (hoping for a better hand) if the total odds of improvement (as a percentage) are greater than the pot odds (as a percentage). Thus if your total odds of improvement total 30% and the pot odds show as 20%, it might make sense to call. Over the long term, you are expected to win more money than you lose. Another way of putting it, you want enough money in the pot to justify calling to see another card.

Pre-flop Before the flop, the first betting round.
Prize Pool The sum of the buy-ins, rebuys and add-ons (less any house cut or fees for hosting the tournament) determines the prize pool.
Raise An increase to the largest bet at the table. In No Limit Texas Hold'em, the minimum amount of the raise must be at least equal to the largest bet placed before you.  If no one else has placed a bet, the minimum raise amount is equal to the big blind. 
Rabbit Hunting In a typical game, if a player wins because all other players fold, any remaining community cards are not dealt.  With this option ON, these cards are displayed so the curious can see what those cards would have been (not that it matters!).  Note:  This practice is known as "rabbit hunting" and is typically prohibited in tournaments. DD Poker has this option and is called Show All Community Cards.
Rebuy A Rebuy is an optional puchase of additional chips once the tournament has started. There are many different variants of rebuys. Some tournaments allow rebuys only if you bust out or your current chip stack is less than the original buy-in amount. Some have unlimited rebuys in this situation, other times the maximum number of rebuys is fixed. Some allow only 1 rebuy but can be done regardless of your chip count. Other variations include a rebuy dollar amount different than the buy-in, and receiving smaller stacks of chips for your rebuy. All tournaments that do have rebuys have a cut off time to do so, typically the first hour, and always corresponding to the end of a level.
River The last card dealt on the board, also called fifth street.
Rock A rock is a nickname given to a tight-passive player. This player type will fold more then average and only raises with the best hands and not aggressively. They are many times bullied out of pots by aggressive players.
Satellite A tournament where the winner receives a seat in a larger tournament. In a super satellite, all the top finishers receive the same prize, a seat in a larger tournament. A super satellite with rebuys and add-ons will award as many seats as possible to the larger tournament as the prize pool can payout. Any remaining money that is not enough to offer a seat is given to the person on the bubble.
Semi Bluff To bet or raise with a drawing hand.
Showdown After the final round of betting, the point at which all remaining players in the hand turn their cards over and determine who has the best hand. It is the resolution of all players that bet or called after the last round of betting after the river card is revealed. The showdown order in which players reveal their hands is as follows: You start with the last player to bet or raise, that person must show their hand first. Then continuing in clockwise order from that player, each player can either show their hand, or choose to muck it. See Mucked Hands.
Side Pot When a player is all-in, that player is only eligible to win the main pot consisting of the bets they were able to match.  Additional bets are placed in a side pot and are contested among the remaining players.

If there is a side pot, a green button will appear listing the number of side pots. If you click on this button, a dialog is displayed showing the amount in each side pot and which players are involved in it.

Slow Play To bet a small amount with a big hand, in the hopes of growing a bigger pot.
Small Blind A forced bet, typically the player left of the dealer button, placed before any cards are dealt. This is usually about half the size of the big blind.
Steal Blinds On the first round, to raise enough so that you chase out every player who has put in an amount equal to the big blind. The concept of "steal" conotates more than just raise though. It means, be agressive, try and take advantage of a situation where, probably the player with the blinds doesn't defend them. That can be a profitable strategy.
Suited With both hole cards having the same suit. Suited connectors are next to each other in rank and of the same suit.
Tilt A player can go on Tilt when they are very upset by having just lost a lot of money or suffered a bad beat. Their emotions take over and bet irrationally, often like a Maniac until they regain control of their emotions.
Tight Describes a conservative player that plays fewer hands then the average player. All players can be classified anywhere between Loose and Tight. How tight a player is playing should not to be confused with their aggressiveness or player type (i.e. Fish, Maniac, Rock, etc.).
Trap To set up a player by slow-playing or giving off a false tell.

A trap hand is any hand that is likely to become the second-best hand, costing you a lot of money to see the flop. The most common trap hands are AT, AJ, KQ, KJ, KT, QJ and QT. Many players limp in from early position and call or raise in middle to late position with this type of hand, just to find themselves having the second best hand, losing the pot. A player with the best hand may try and Trap a player with these cards making their opponent think they have won when they have not.

Turn It is a players turn to act when the action is on them to make a decision. Or the fourth community card, also called fourth street is known as the turn.

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