Do the clothes make the chav or does the mentality of the chav bring the clothes towards it? I mean, you have to analyse their mental state as well. They are governed by many rules it seems:
1) Old ladies are put on the street to be mugged.
2) A sentance doesn't need a capital letter or full stop, but must include at least three expletives.
3) After 9pm you must be out of the steets drinking the cheapest booze you can find.
4) Bus shelters and telephone boxes are put in place as a challenge with the evil bus and telephone companies. Can we break the windows as fast as they keep replacing them?
5) It's cool to be pregnant. It is your duty to reproduce as fast as you can so an army of chavs can be produced to take over the council estates of Britain.
6) TWOCing is the ultimate in respect (take "Bad Boy TWOCers for life", the group that went to my school and were responsible for a whopping 500 car thefts a month in my local area. When they got put away, the number of car thefts dropped to 35.)
7) You're a wonderful guy/gal/it, so everybody should be happy to hear the statement "Can I lend 10p?" and understand that you mean borrow, not lend. Why you want 10p is not their business. If they don't, then they're being entirely unreasonable and need to be mugged.
8) If it can be smoked/snorted/sniffed/inhaled/eaten/injected, then it should be. After all, drug dealers have your best interests at heart.
9) The shinier the clothes, the better. After all, man is descended from magpies.
10) School is optional. After all, you're a nocturnal creature and only surface in the dark hours.
Be on the look out for such creatures. They hunt in packs. Fortunately, they move very slowly and can't see very far, so you can turn back/walk over to the other side of the pavement/go a different route before they get anywhere near you. Beware though. At the speed at which chavs multiply at compared to the relative speed at which normal people do, in the next 40 years the chavs will overun normal people. Then we really are in trouble.