A casino marker is a form of credit extended by a casino to players, allowing them to gamble without immediate cash. Essentially, it acts like a short-term loan, where players can request markers for a specific amount, which they must repay within a set timeframe. To use a marker, a player typically needs to provide identification and may need to establish a credit line with the casino. Once issued, players can use the marker to place bets, but failing to repay can lead to serious consequences, including legal action. Always gamble responsibly and understand the terms before using a marker.