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1.
cockney rhyming slang to define a black person as a nigger, the words oil rigger are usually used by a person with a large penis... LOUIS!
"dude thats one grimey lookin' oil rigger"
by louis20114 September 24, 2011
 
2.
The act of sticking one or more fingers into someone's anus (clothed or not) while shouting,"Oil Rigger" in a country accent. Best used when the victim is bending over, walking up stairs, or standing in front of you. The reverse reach around Oil Rigger is also always a challenge.
I definitely penetrated the bootyhole when I gave that dude an Oil Rigger on the escalator.

I gave Jimmy the dirtiest rusty hook after I Oil Rigged his fart box.
by Silky J Johnston December 10, 2011