As someone who grew up in a trailer park and was stigmatized by it:

I still use the term trailer park trash to describe people who refuse to change their trailer park trash mentality or better themselves.

To me, trailer park trash describes a mindset and not circumstances.

I don’t look down on my fellow poors, but I look down on their willful ignorance.

It gets in under their skin, the one thing every rich pissant I have encountered feared the most is being seen as white trash. Wait there was the one dude who was really fucken scared of badgers for some reason.