What is a 'chav'?
As you can clearly see. The chav is a failed product of society. It is overly aggresive due to its inferior intelligence. It compensates for its poor choices in life by milking the benefits system. A system designed to help those get back to work, they use this system as a lifestyle choice.
By calling people "chavs" in general it implies that the people do not perform to certain standards and should act this way and that, forgetting that to have a thriving society the groups of people in it would most likely act different to each other. Sadly, the use of this word has become widespread and most of the users you'll find know nothing about these people's lifestyles and only what has been dictated to them but never researched.