In simple terms the British working class version of a Redkneck. Usually associated with youths and hoodies as well as racism, hooliganism and antisocial behaviour.
A chav someone who dresses in lower designer sports brands and cheap attire from generic mass produce shops. They are proud and patriotic and are brought through the pub culture. They are extremely easily influenced and manipulated by media and find it very difficult not to become Hipsters.
As a Stereotype it has been blurred by the media to mix in other ethnicities especially when concerning anti social behaviour however it is mostly relevant to British working class Caucasians.
Originally Chava was the word used to identify someone with cheap knock off sports branded and Burberry clothing and gold jewellery but it was later on shortened to appropriate a catchy stereotype.