I'm not Italian, but Argentinian and it's funny how we have most of these, though some of the definitions are slightly weird to me, for example, the one on the cover means "what", back tips of the fingers on the chin means "I don't know". There's also a very interesting one we have, idk where it comes from, where one closes the fingers and bends the thumb a couple of times, sometimes accompanied by saying "minga", which means something like "jaja, no way, not doing that".