Guts is a very
stressful poker variation. Each player
antes, then receives two cards from the
dealer. Since you have only two cards, the best possible hand is two
aces, and the worst is a two and a three. Remember,
suit doesn't count in poker.
After looking at their cards, each player reaches into their pile of chips and conceals a chip in their hand (if they wish to stay in) or doesn't (if they wish to fold.) On the count of three, all players open their hands to show whether they're in or out.
The winner (the person who stayed in and had the best hand) collects the pot. The losers (anyone who stayed in but didn't have the best hand) must match the pot. Anyone who folded doesn't pay anything. Then everyone (even those who folded) tosses in their cards, gets two more, and the process repeats. If everyone folds, everyone draws new cards and replays the hand. The game ends when only one person stays in; they get the pot and the game is over.
As long as you have five or more players, the pot gets big, fast. Craziness ensues. It's all the showdown of Poker with none of the brainwork.
Wanna push your blood pressure even higher? Try Hold Your Guts.