- idiot end, ignorant end
- The bottom end of a straight.
- immortal
- Unbeatable; often said of a hand that a player knows cannot be beaten under the circumstances of play. Also "lock", "nuts".
- implied odds, implied pot odds
- 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
