Cheat at a board game and your friends will remember it longer than who won.

Nobody keeps the score of a game from three years ago, and everybody keeps the story about the person who moved their piece. The stakes were nothing, which is exactly what makes it stick. Cheating when the prize is meaningless tells people what you might do when something is actually on the line, and they file it away without deciding to.

Call your own foul next time, out loud and cheerfully, even if it costs you the round. Losing a game is forgettable. Being the one who said so when nobody would have noticed is not.