Coin flipping is a game of chance. It involves flipping a coin and guessing which side it will land on after it's thrown into the air. Heads is one side of the coin and tails is the other side. You can play coin flipping with a friend or by yourself. To play it with someone else, you both guess which side the coin will land on, like heads or tails. Then, you take turns flipping the coin. Whoever guesses the side the coin lands on wins.