slang A typically blue-collar worker who is employed in the extraction or production of petroleum. (Can be considered pejorative, depending on the context and the intention of the speaker or author.) The oil rigs are the only big employers around these parts, so 9 out of 10 people you meet are oil trash like me.The businessmen who control the oil companies in this country don't give a rat's behind about us oil trash who make the whole thing work.