J - Poker Terms
Jackpot -
1. A variant of five card draw with an ante from each player, no blinds and an opening requirement of a pair of jacks or better.
2. A large pool of money collected by the house and awarded for some rare occurrence. For example, hitting a royal flush or having quad eights or better beatan.
Joker - In non-standard poker rules a joker can be used as a wild card, typically draw poker. Normally the joker may only be used as an ace, or a card to complete a straight or flush, in high games, and as the lowest card not already present in a hand in low game. See bug.
Juice - The amount of money the casino takes from each pot. This is typically 5% of called bets and raises. Also chop, rake, vig or vigorish.
Junk - A hand with little expected value. Also garbage or trash.