LOL I found Devvo on YouTube by sheer chance one day...
He and some chav mate of his were sitting in front of a webcam miming "Breakfast in America" by Supertramp... I cringed. Ruined the title track from one of the best albums I've ever heard in my whole life.
That said, I think chavs are scum. Buy the book "CHAV!" by Clint Spanner and Mia Wallace... only covers English chavs, but the differencess to Scottish ones aren't that big.
Oh, and I heard they're called "Chavs" because the first ones appeared in Chatham in Kent.