In Blackjack, Double or Nothing allows a player to double their original bet after seeing their first two cards, but they must take exactly one more card. If the final hand wins, the player receives double the winnings; if it loses, the entire bet is forfeited.
Double or Nothing Example
For example, if a player starts with a $50 bet and chooses Double or Nothing, they wager an additional $50, and if they win, they collect $200 (their original $50 plus $100 in winnings). If they lose, they forfeit the entire $100.