2 or More
Flip a coin to decide who starts the game. The person who starts the game (The Caller) chooses another player to say three different stories about themselves. Two are true and one is lie.
The caller must shout “Bullshit”, then guess which one is the lie. If The Caller guesses correctly then the other person has to drink half of their drink. If The Caller gets it wrong they have to drink half of their drink.
If The Caller gets it right, it moves on to the next Caller. If not then The Caller asks someone else until they get one correct.