my understanding of the word chav is that it is used in relation to someone like Vikki Pollard, the character from little britain.....a dozen kids, each with a different father, foul mouth, aggressive, on benefits - as a lifestyle choice (some choice !), not through hardship or necessity, steals, not well educated, goes around hurling abuse at people......
Basically, a nasty, selfish, irresponsible thug who harms (either through harrassment or physical violence) other people and who always has their hand out for anything they think they are 'entitled to'.
That's how I've understood it, based on what I read and see on tv.
I've always seen such people, but just saw them on an individual level, not as a group, iyswim. i.e., he's a nasty bastard.
Thing is though, there are nasty, selfish, irresponsible thugs from all walks of life - I have never known more thuggish pricks than the Hoorah-Henries of the upper classes, yet they are not looked down on.
Why? Because they have money - and it must be inherited money btw, earning your own gets you sneered at in those circles. Nothing worse than New Money to them - and speak in that awful drawl of the Eaton/royal family/Hyacinth Bucket sort and are seen to be Educated. (although they are plainly ignorant as hell)
So basically, if you are a thug and you're poor, you're a chav. If you're a thug and your great great great great grandad licked the arse of some king or other or stabbed enough people in the back, then you're a toff. Yayayahahayahk
And working class people are just normal people. Average Joe, living their daily life, nothing to do with any of it.