In the United States, giving someone a thumbs up making a horn shape with your fingers are usually considered to be friendly gestures. But in other countries, those hand signals might have an entirely different and potentially insulting meaning. When traveling abroad, you should always be aware of local customs and etiquette rules. Rather than risk offending a local, take some time to learn about what’s considered impolite before you travel to an unfamiliar location. To start, here are six common hand gestures that you should avoid using in certain countries.Reverse “V” Sign – United KingdomIn the U.S., holding your...