BN’er stands for Bekende Nederlander, or famous Dutch person. It is the title given to a host of soap stars, entertainers and other personalities who fill the gossip columns and turn out in droves to film premieres. Top-ranked BN’ers include football wife Estelle Gullit, anti-wrinkle queen Vanessa and tv show host Paul de Leeuw. The quickest way to become a minor BN’er is to get a role on a reality tv show or bring out a rap record with Ali B.
Definition from www.dutchnews.nl