Liar's Dice is a popular bluffing game played with dice. Each player has a set of dice hidden under a cup, and they take turns making bids about the total number of dice showing a certain value. Players can either raise the bid or challenge the previous player's claim. When a challenge occurs, all players reveal their dice. If the bid is accurate, the challenger loses a die; if it's false, the bidder loses a die. The game continues until only one player remains with dice, making them the winner. It's a game of strategy, deception, and luck.