A misdeal in poker is a deal that has been nullified due to an error. When a misdeal occurs, the hand must be restarted. This results in the dealer collecting all of the cards, shuffling them, and distributing them to start a new hand.
Misdeal Poker Example:
One of the most common examples of a misdeal is when it occurs due to the dealer’s error.
For instance, while distributing the cards to the Big Bling player, the dealer accidentally deals one card so that it lands face up.
Another cause for a misdeal would be if the dealer inadvertently deals three cards to a player.