Connor A very different writer, but Flannery O'Connor has a book called Revelations which is about this very smug person, "Thank goodness, I'm not white trash."
Apparently having children who enlist in the military, get pregnant, decide to have the child, or who are born with Down Syndrome makes a parent whitetrash.
You know I'm sitting here in England right now, and I'm having to do a lot of explaining about a concept that we know there in America but folks here are wondering what whitetrash means.