Cheat

Cheat (also known as Bullshit, B.S., bluff, Bologna, and I Doubt It) is a card game where the players aim to get rid of all of their cards. It is a game of deception, with cards being played face-down and players being permitted to lie about the cards they have played. A challenge is usually made by players calling out the name of the game, and the loser of a challenge has to pick up every card played so far. (wikipedia.org)