Thinking
you're better than other people because you're
working class, have a regional accent, don't use
big words, read tabloid papers, or for other reasons which are opposite to those which would be involved in "snobbery" in the usual sense.
The
argument that people who live in "rough" areas are
the only ones who "know" about crime and that
everyone else should shut up is just an example of inverse snobbery.