Poker jargon - I - MultiMedia

immortal: Unbeatable; often said of a hand that a player knows cannot be beaten under the circumstances of play. Also “lock”, “nuts”.
improve: To achieve a better hand than one currently holds by adding or exchanging cards as provided in the rules of the game being played. I didn’t think Paula was bluffing, so I decided not to call unless I improved on the draw.

insurance: A “business” deal in which players agree to split or reduce a pot (roughly in proportion to the chances of each of them winning) with more cards to come rather than playing out the hand, or else a deal where one player makes a side bet against himself with a third party to hedge against a large loss.
in the bushes, in the weeds: A player slow playing is said to be “in the bushes” during the time he is quietly checking and calling while others bet aggressively. He will eventually “decloak”.
in the middle

In a game with multiple blinds, an incoming player may sometimes be allowed to post the blinds “in the middle” (that is, out of their normal order) rather than having to wait for them to pass.
A player being whipsawed is said to be “in the middle”.

in the money: To place high enough in a poker tournament to get prize money.
in turn: A player, or an action, is said to be in turn if that player is expected to act next under the rules. Jerry said “check” while he was in turn, so he’s not allowed to raise.

irregular declaration: An action taken by a player in turn that is not a straightforward declaration of intent, but that is reasonably interpreted as an action by other players, such as pointing a thumb up to signify “raise”. House rules or dealer discretion may determine when such actions are meaningful and/or binding.
irregularity: Any of a number of abnormal conditions in play, such as unexpectedly exposed cards, that may call for corrective action.