The North Shore is the name given to the general vicinity of the greater Auckland region north of the Auckland Harbour Bridge. This upper class area of Auckland features some of the most expensive houses in New Zealand with a current median house price of of over NZ$300,000. Also sometimes referred to as North Shore City, or just The Shore.
There's a bit of rivalry between the residents of the North Shore and the rest of Auckland. Akin to New Zealand versus Australia or Aucklanders (aka JAFAs) versus the rest of New Zealand, but on a much smaller scale. Often, sports matches between the North Shore team and the Central Auckland teams gets dubbed 'The Battle of the Bridge', referring to the boundary between the two regions, seperated by the Auckland Harbour Bridge.