In the Scandinavian countries we have a very similar cultural bugbear called "Jantelagen", or the Law of Jante.
The "law" was written as a satire of the (highly real, unfortunately) attitude in some parts. The short version of it is just "You are not to think you're anyone special, or that you're better than us."
https://en.wikipedia.org/wiki/Law_of_Jante