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1.
An oilpatch worker who has more money than brains. Usually are prolific alcoholics, drug abusers and whores. Most drive full size domestic pickups with a lift kit and big mud tires.
"She got knocked up by some deadbeat rig pig. He can't afford child support cause he's addicted to coke."
by wing chun November 07, 2005
 
2.
Typically a scummy oil industry tradesperson, the bottom of the barrel on an oil rig. The toby/gopher who gets all the crappy jobs.
The term is now en vouge and tradespersons are lowering themselves to the term as a form of rebellion.
Rigpigs typically drive stupidly oversized 4x4 trucks, called RigRockets, usually decked out with ALL the plastic wind deflectors and fake chrome doo-dads they can find at JC Whitney or Canadian Tire. They also tend to drive aggressively, battering their way through traffic with little to no regard to anyone who drives a smaller truck or makes less money.

Joe drives his rigrocket through traffic, aggressively tailgating until other drivers move out of the way. Joe's ugly APC chrome trim glints garishly in the sun and his farmer-tanned elbow juts out the window in a challenging gesture while he listens to crappy grind-core.
Joe is a rigpig and damnit, he's proud.
by Barry L June 13, 2008
 
3.
A Term used to refer to Prostitutes or whores who would travel around to the Rig camps in the 70's and 80's to service the hard working men of the oil patch.
Cory cant wait to finish his shift so he can go and see the Rig Pig at camp tonight.
by Rig Pig abuser November 22, 2013
 
4.
Is a mechanic who works on drilling rigs. They are called pigs because they are always wallowing around on the ground or rig floor working on things. When they get up, they are covered in oil based mud. A motorman is a good example of a rig pig. He is usually the most dirty person out there.
Call a rig pig to come fix the ST-80. The roughneck will just mess it up worse.
by Louisianamuddawg August 05, 2010
 
5.
Girls who inject illegal drugs, often those who exchange sexual favours for drugs.
"Eeewww, if you are going to get with that rig pig, you'd better double wrap your dick!"
by collector girl October 26, 2007