Not sure where this is from, I had heard "council Housing and Violent" equally I'm not sure where that came from, and whether it's accurate. I have used the word chav on occasion, so don't want to get on my high horse about it. However, when I use it (having first heard it about 2004), it's to describe some knob boy racer with a load of bling (and probably a fair few quid). These days, it seems to be more directed at a certain demographic "underclass" if you will, and that it when it starts to become nasty.