The last thing you want to do as a tourist abroad is offend the locals. And usually—we hope, at least—no one’s trying to purposefully antagonize anybody when traveling. But even the most seemingly innocent gestures can mean something pretty distasteful overseas.

In a recent Ask Reddit thread, users of all backgrounds and geographic locations chimed in to answer the question: What’s extremely offensive in your country that tourists might not know about?

Check out the round-up below, and try to avoid any obscene hand gestures in the meantime, okay?

Brazil: Not okay

Germany: Sieg heil—still never funny

Britain: Two fingers

Costa Rica: Don’t slam car doors

Thailand: Feet and heads

The United States: Tip your waiters and waitresses

Australia: Fanny packs mean something else here

For more tourist offenses, click here to view the original post.