oiler

noun11

1. •
   One who or that which oils.
2. •
   An assistant in the engine room of a ship, senior only to a wiper, mainly responsible for keeping machinery lubricated.
3. •
   Any of various automatic devices for oiling pneumatic tools or other tools.
4. •
   An oil tanker.
5. •
   A small (typically thumb-sized) metal container of oil, often containing an integral brush.
6. •
   Synonym of oilcan.
7. •
   (informal) An oilskin coat.
8. •
   Synonym of oil well.
9. •
   (slang) A heavy drinker; especially, an alcoholic.
10. •
    (slang, disapproving) A sycophant, which is someone who is oily (smarmy).
11. •
    (US, offensive) A Mexican.

    • 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, […] — 1907