Is "white trash" a slur?

[The Right Honourable Martin Brian Mulroney PC CC GOQ]

It's a slur, but not every slur is made equal. The way we react to slurs is socially conditioned. The n-word for example is considered the "worst" slur in American culture, to the point that I didn't even have to say the word, and there are thousands of words that start with "n", yet we all know what the n-word is.

But at the end of the day, it's still a slur, even if it's considered less offensive than some others. A slur, as far as I'm concerned, is just a derogatory word used to describe people with certain characteristics. White trash fits the bill to a T.