Hand signals. They’re not something I’d particularly looked into previously. Once you start doing a bit of research it’s actually a pretty complicated field with the same basic gesture meaning different things in different places to different people so depending on who and where you are you this hand could potentially mean a few different things. What looks to your average British person like the ‘OK’ sign could also indicate a zero.
Apparently in most continental European countries, when the sign is placed over the nose, with the nose protruding through the O made by the thumb and forefinger, it means ‘drunk’. Furthermore in the Arab world this sign represents the evil eye, and is used as a curse, sometimes in conjunction with verbal cursing. So there you go. What you thought of as ok isn’t really. It’s all rather ambiguous. So just watch remember to watch yourself out there if you’re flashing some complicated hand signals…