Oilfield trash is a term given to someone who works in the oilfields, typically as a Roughneck, and is caracterized by the following traits..
-likely has several tattoos

-drives a truck that is worth more than their house. They likely have a decal on the back of said truck that says "oilfield trash"
-is constantly covered in filth from working on the rig all day
-cusses every other word
-has never been married but has had many wives.

The true test to see if someone is oilfield trash is that they will feel a sense of pride in being called oilfield trash. They like it when people call them oilfield trash and its the highest honor for someone to call them that.

Oilfield Trash: the term likley began as a pejorative coined by locals in towns that experienced a rapid influx of oilfield workers arriving to drill and service oil and gas wells or provide oilfield services to the industry. Some of the stiff-necked town Fathers (and mothers) saw the oilfield workers as rough, itinerant vagabonds with too much money to spend and a serious lack of moral fibre verging on criminality. Never mind that the oilfield people could be professional engineers,geologists and technical people who made more in a month that most of the locals did in a year. Some were indeed not well "house-trained" but Bar owners, hotel owners and merchants soon discovered that most of these oilfield folks were actually pretty good for business. Today the term is seldom used outside of an "in-joke" among veteran oil patch people. The industry has matured workers are better trained for the most part and the numbers of truly uncivilized or trashy folk are dwindling. In the 1950's one snarly old town councillor (in a prairie city that will remain nameless)wanted to implement a by-law to prevent the "oilfield trash" from living within the city limits, instead having them live in trailers in an oilfield "ghetto" out on the prairie! He lost. In the ensuing years it was the influx of oil and gas money that made the place (and many others like it,) what it is today.

A group of individuals employed in the oilfield industry who feel obtaining liquid gold gives them a god like complex. Unfortunately in most cases this group is usually comprised of men who wear dirty jeans even on days off to simulate working all the time and possess below average IQs and penis size. These downfalls are usually compensated with large trucks and even larger tires.

The use of a wheel well as a urinal. This is done by standing next to the wheel and putting your hands on the hood and urinating in the wheel well. It is important to look relaxed and even holding a phone helps. It is a good way to urinate in public and look inconspicuous.

An oilfield handshake is when two men stand face to face with their pants down around their ankles. The two men vigorously jerk each other off. There must be direct eye contact and it's not over until both have finished.

A collaboration or pure bread degenerate idiots whom decided to deem themselves “The Oilfield Mafia”. Origin remains unknown.

When a oilfield worker goes out of town for work and hooks up with a women and gets an std “rash”

Oilfield worker that only has loyalty to his money and family. They are typically highly sought after employees who will leave one come pay for another to do their dirty work for more money.

When a woman enters or works at an oilfield site with many males. A scale of 1 to 10 is required for scoring a woman's beauty, but in the oilfields, that scale is skewed. An average 5 beauty scale would make a woman a 10.