Hmmn, a "journalist" . . . that's a much worse slur, the way I use English.

I'd far rather have a pint with a chav than any fucking journo.

I agree with previous comment. Chav is a subculture that partially intersects with most other classes, except probably no overlap with fully inbred level pure-toffs. I'd say well over half of working class would not be classed as chav.