The classic sign for good luck has deeper roots than you might think. It likely began with early Christians, who crossed fingers as a secret symbol of faith and protection during persecution. Even earlier, pagans believed that crossing objects could trap good spirits.

By the 14th century, people in Europe were crossing fingers—alone or with a friend—to make wishes stick. Today, it’s a go-to gesture for luck in everything from exams to awkward moments.

But here’s the twist: in some cultures, crossed fingers behind your back mean you’re lying. One small gesture, two very different meanings—hope in front, deception behind!