it's a common english stereotype, which i don't understand that well.
and as you can see, i'm not good at explaining. :P
so take a look at this: http://www.urbandictionary.com/define.php?term=chav
some people have wrote what chavs are like, if that helps.
Have you heard about the gorilla that got out of his cage in Holland. That is actually really nearby. It's in the city I live in. His name was Bokito and this woman was bullying him so he just broke free to go after her. Glad I wasn't at the zoo then. Oh btw this happened about half a year ago.