The dealer places cards face down in the design of a flat pyramid. The base row should have 6 cards, next row should have 5 cards, then 4 cards, then 3 cards, then 2 cards, and 1 card at top.

The dealer then deals out four cards face down to each player. The player can look at their cards once and once only. They need to memorize their numbers. It's a good idea to place your cards down in an order so that you'll remember where each card is.

The dealer flips the first card to the right of the base row. If a player has that number, they can tell anyone to take a drink. Even if they don't have that number, they can tell a person to drink. However, if a person says BULLSHIT to you, then you have to drink twice as much as you told them to drink. The same rules apply for this whole row.

For the second row, players take two drinks (or 4 drinks on a bullshit) With each row, it's an extra drink and it's always twice as much on the bullshit. So when you get to the top of the pyramid, you're telling people to drink a whole beer.

If someone ever bullshits you, if you don't have the card, just drink. But if you do have the card, show them the card, and then they have to drink double for bullshitting you. Aye there's the rub! Also, even if you have the number, if you show them the wrong card, you still drink double. For any card that you flip over, you can discard it and get a fresh card that you look at once and then put face down with your cards.

Just for a finishing touch ... At the end of the game, each player says what each of their cards is and flips them over. For each incorrect card, they have to take a drink.