They used to say of Willenhall folks (if you were from Wednesbury) "They put the pig on the wall, to watch the band go by".

But this must date from a play or song I have no knowledge of, because I have heard this of two villages in the Forest of Dean, and two villages in Yorkshire.

AFAIK the Willenhall people said it of Wedgebury (affectionate name of Wedgeburyites for their town). Ditto FoD & Godzone.

As for NZ they are far more aggressive in their assessment of the four classes of NZ residents. There are the EuroNZs, POMs, Maori and cocoanuts (their term for Samoans and Fijians etc). Sadly the EuroNZs have a propensity to say "No" to any question they don't know the answer to. When the real answer is "I don't actually know". Even officials tasked with the job of knowing like librarians. In my experience of doing research in Wellington, it took me several "beliefs" before I translated and got on with the search, without their help.