kebab4you said:
Uhh gestures... not wearing shoes inside(does that even count? even if it does, doesn't all of the world do that except US)?
I'm from Britain, and people only do that sometimes, and those that do are usually seen to be a bit stuffy and overprecious about their carpets.
According to the Greek side of my family, if you put your hand up palm-forward towards someone, which people in Britain or the USA might see as saying 'stop', in Greece people use it as a nasty gesture meaning 's**t in your face', although it's usually accompanied by those words, too (in Greek, of course).
Also, I don't know how many other countries do this, but in Britain, if we're about to cross the road and a car stops for us, we quickly put our hand up in a similar way as we cross, palm towards the driver, in order to say thank you. Drivers might do the same to other drivers that let them pass, although it'll be accompanied with a double flash of their lights in case they don't see the hand gesture.