Maybe your aunt had an affair with a priest and accidentally got pregnant.
Perhaps your family secret is actually kind of dark, and everyone involved refuses to discuss it.
Or maybe you uncovered a secret in your family, but no one knows you know it!
It's story time, folks. Tell us your family's best, biggest, funniest, or craziest secret via the DropBox below, and you could be featured in a BuzzFeed Community post or video!