I read some very good ones yesterday.
What do you call a chav in a filing cabinate?

Sorted!!!

What do you call a chav in a river?

Innit

What do you call a chav in a freezer?

Chillin

Why do you have to resist the temptation to run over a chav when he is on a bike and you are in your car?

Because its probably your bike hes riding!