It's a term used for unregulated Sewer oil. Sewer oil barons benefit greatly from the ease of collecting this oil in urban zones. Oil buoyancy pushes it to the surface where the oil is easily collected by legit tax paying refineries. However, unregulated Sewer oil merchants don't pay the Chinese govt Taxes, so these outlaws are stuck with the unfavorable Gutter Oil label.

The first documented report of unregulated sewer oil was in the 1960s, where sewer oil was exported from Japan to Taiwan and then used in food processing.

Most sewer oil is properly refined today and poses no health risk to consumers.
Bernard: Joe was that you in the noodles joint? I thought you were going healthy?

Joe: You mean Kuishimbo? Its a dandy restaurant that serves healthy food

Bernard: Like it or not, they serve overpriced cheap noodles, sugar, lowest quality rice/meat & refined Gutter Oil

Joe: I never heard of the Gutter Oil before, Are you sure about that?

Bernard: All cooking oil merchants use cheap Chinese fillers to cut their oils, those usually contain refined Gutter Oil

Joe: That is illegal

Bernard: Gutter Oil Corporations pay all their taxes, so its 100% legal.

Joe: Damn it everything is a Scam

Bernard: As a citizen/peasant you are expected to pay dearly for everything...
by Felix Jabs Arnold January 09, 2019
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Jealous. Arose from an accusation of a person who walked into a nice house, became jealous of the homeowners, and then secretly began dropping oil on the carpet and ruining it, leaving the owners to wonder where the mysterious oil spots came from.
1. Adjective: She and I both used to be cool, but she's been droppin' oil ever since she was fired from the warehouse.

2. Verb: He started droppin' oil after finding out his best friend is dating his ex.
by The TrUth will find you out March 03, 2013
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To wreck hard while skiing or boarding.
Man, I was gnaring hard in the timber , when I hit an icy patch, I thought I was going to oil the rhino.
by Kittypetter January 13, 2017
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either oil that restores wood to its natural luster and hardness or a girl that is hot enough to give a guy a boner thus restoring his wood to its natural luster and hardness.
guy1 walks in wearing butt shorts
guy2:"what a wood killer!"
guy1:"assuming you had wood"
a girl in a tube top walks in
guys1and2:"wow who's the teak oil!"
by the situation December 16, 2012
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Johnny pulled his cock out of the whore's throat and sprayed his man oil all over her face.
by grease pump May 23, 2010
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When a male and or female has a bad case of the runs and you stick you're fingers in their anus causing their asshole to gush diarrhea like you just struck oil
Jack - "Damn, dude. I tried to finger my girls pooper last night but i ended up striking some oil."
Todd - "gross! Sounds like you were the victim of THE OIL WELL!"
sex anal buttsex theoilwell diarrhea feces iraq cleveland steamer hot lunch
by Shitcakedasshairs May 05, 2016
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Slipped in the oil A phrase from North California that describes a situation where an individual due to not paying attention or feeling carefree, is caught off-guard and ultimately takes a loss.
I felt my pocket after I got off the bus and man's weed and money was gone, I really slipped in the oil.
by Rouleng Payhpurz December 18, 2014
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