This is the definition I found: Chav is a slang term which has been in wide use throughout the United Kingdom since 2004. It refers to a subculturalstereotype of a person with fashions such as flashy "bling" jewellery and counterfeit designer clothes or sportswear, an uneducated, uncultured, impoverished background, a tendency to congregate around places such as fast-food outlets, bus stops, or other shopping areas, and a culture of antisocial behavior.
"Upper Chav: The Beckhams former Spice Girl Victoria and her footballer husband David are Chav royalty. They observed proceedings from hisnhers purple thrones on a raised dais at their wedding, sold the pictures to OK! magazine and named their children Brooklyn and Romeo
Middle Chav: Daniella Westbrook the former EastEnders star and huge fan of Burberry-themed outfits; the fashion house claims that Ms Westbrook has almost single-handedly ruined its reputation when she was photographed wearing Burberry check from head to foot. Lower Chav: Wayne Rooney and Coleen McLoughlin: the 19-year-old Manchester United footballer and his fiancée wear Von Dutch tracksuits with diamante thongs (her) and bright white adidas sportswear (him)"