Crossing your legs: Crossing your legs in parts of the Middle East, especially if you're sitting opposite.
Talking with your hands in your pocket: Though it may seem like a casual gesture, it’s considered rude in Germany.
Peace sign: In the UK, the backwards peace sign (palm facing toward your face) is equivalent to flipping someone off.
Thumbs up: If you give a thumbs up in the Middle East, Latin America, and western Africa.
Asking what someone does for a living: Asking this question in the Netherlands is the same as asking how much money they make.
Slurping: In Japan, slurping is essentially considered to be music to the ears of any chef.
Referring to the US as just "America: If you want to talk about your country while in South America.
Drinking a cappuccino after lunch: Before noon, having a cappuccino in Italy is perfectly normal, but afterwards.
Blowing your nose: It is considered rude and even repulsive in countries including China, France, Japan.
Smiling at strangers: In Russia, a smile is seen as an intimate gesture, indicating a genuine affinity toward another person.
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