Action - betting or playing.
BP, or Big Player - a high roller.
Checks - the chips that are played--red, green, black, etc.
Comp - free or complimentary.
Cut - this is when the dealer offers a player a plastic card to slip in the stack to break the deckbefore dealing.
F&B - complimentary Food and Beverages when referring to comps.
High Limit - usually the term used for tables and slots with minimum bets of $100 dollars for tables and $25 for slots.
The House - the casino.
Push - when the player ties the dealer in Blackjack "21." No money is exchanged.
RFB - complimentary hotel Room, and all Food and Beverages.
Shoe - the rack where the cards are placed to deal when using more than two decks.