Carousel - A group of slot machines that are positioned in a ring, enabling a change person to change bank-notes into coins to stand in the center. Gabmling rules and payouts and play variations vary from place to place.why gambling should not be illegal NODEPOSIT BONUSES blackleg - An old jargon term for riverboat gamblers (meaning cheaters and outlaws) that operated in the rough and dangerous towns along the Mississippi river. Casino glossary of terms A to F. Terminology. In blackjack and baccarat, the the cards are washed when old decks are taken out of play and fresh new decks. An A-to-Z glossary of betting terms. Ajax, UK Slang term for Betting Tax. . French had a "metric" money system while UK still used 1 pound of old pence.