Oiler

The order to rename the oiler ship USNS Harvey Milk – christened four years ago – is unusual but is in line with the White House mandate to reverse a number of military initiatives by Democratic presidents.

Near-synonym: greaser

There were a lot of renegades down towards the Mexican line who made a raid once in a while, and a few oilers livin' near had water holes in the foothills, […]

He also said that it was just as difficult to make friends at Cheam School and at Cambridge because he couldn't be sure who 'genuinely liked him' and who were 'trying to suck up' to him because of who he was — 'oilers', Princess Diana once called such people.