Oil Trash Meaning

(slang, idiomatic, sometimes pejorative, sometimes ethnic slur) An uncultured, rowdy roughneck employed in the petroleum industry, especially a "white trash" person if used negatively.

Example: 1986, World oil: Volume 203, Issues 1-6, link
  One of my biggest complaints in this mess is that oil people are not speaking out. I am third generation oil trash, and beyond my personal loss in business, I love this industry and the people who gave it birth.
2007, Paul Catrer, Don't Tell Mom I Work on the Rigs: She Thinks I'm a Piano Player, page 113
  We kicked on to a few more bars, having a good time, until a group of drunk American businessmen called us “oil trash” and shoved Erwin. We were not dressed like oil trash, we didn't draw attention to ourselves or look for trouble.
2011, Richard Ben Cramer, What It Takes: The Way to the White House, link
  Never called anybody “oil trash.” Never had a bad word for anybody.