BUCK (or PUCK, or BUTTON):  Because casino games are dealt by house dealers, a small disk is used as a marker to indicate the player in the dealer position. That player is always the last to act. This disc can be called a "puck" or a "buck" or a "button". The button rotates clockwise around the table with each hand that's dealt. The expression "passing the buck" refers to poker. President Harry S. Truman was an avid poker player himself. He had a sign on his desk in the White House that read "The buck stops here".

Keep your cards in plain sight. Players need to keep their cards on the table during the play of the hand. The best way to protect your hand is to keep it on the table. Look at the cards by shielding them with your hands while lifting a corner of each card to peek at it. In a game like Texas Hold'em, where players have only two cards in front of them, it is customary to leave them on the table after looking and to place a chip on top of them. This alerts the dealer that your hand is still in play.