Casino Glossary - X
x
Used to denote "any card" at poker and blackjack forums (usually poker) e.g. "if you find yourself with Ax in the small blind" means "if you find yourself with an ace and any other card". See our sister site for a guide to poker rules for beginners.
X-X-X
Winning payout line at a noughts and crosses slot machine (we were determined to find a gambling term beginning with "X", alright?)