In a casino, what is a warp?

In the casino industry, we call it a "dealer tell," meaning, a dealer who gives away information that the casino believes players shouldn't possess. In this case, when a dealer checks the hole card under tens or aces, some inexperienced dealers will unknowingly bend those cards upwards. This will cause the tens and aces to have a different shape than the rest of the cards in the deck. With this information, the sharp-eyed player believes he knows the dealer's hole card by its disfigured state-which is known as "playing the warps."

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