Also known as mexican rust or mexican mud or mexican tar; very impure form of injectable heroin. The drug is often an unorganized mix of opiate plant-based substances. The drugs derived typically go uncleaned due to the harm water can do to the active ingredient diacetylmorphine (the agent that gets the user high). The substance is extremely thick by injectable substance standards, and often causes veins to explode during injection.

Rust was first spotted in Ecuador, but is believed to have been first produced in Mexico, due to the combination of substances in the drug being native only to the Mexican swamps. Ciudad Juárez, Mexico is the leading exporter of rust, at about 65% of the entire market. Second is São Paulo , Brazil, with around 17% of the market.

Rust is sold exclusively in injectable form, and is sold by the gram. Where as high-quality heroin sells for about $200/gram, rust sells for about $55/gram.
Raul - "I heard Cortez got arrested the other day. Heard he was selling rust by Sheepshead Bay."
Tommy - "I heard the same. Police are cracking down on that sh*t, vato."
by Doctor Vox October 1, 2013
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The skins on the outside of peanuts (not the shell, the skin) can be used when no weed is readily available, gives a small relaxing buzz, espically when dried out
Dude You Wanna Go Somke Some Rust
by nate October 15, 2003
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A Game: were you run around with a gear-set you worked so hard to get and then the six hours of grinding ends to you getting raped by roof campers, door campers, Grubs, The piece control kyle, then you have the trap basers thinking there the next memeio. You got kids screaming ni**a like its a religious cult offering. Ni**a this Ni**a that, they all say Ni**a while you look from your left to right seeing cock after cock and titties. Its like a racist teen orgy full of players that play sooo weirdddd. Ahhahhahahahahahahahhhhhhhhhhhhhhh. i hate my life
That Fuckin kid plays rust, he is definitely a dirty racist
by TheRustChad?? November 30, 2022
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A curse word,
originating from the annoyance of something important rusting due to bad maintenance or weather conditions.

It can be used in a similar way one would use "fuck" or "god"
"Rust, I missed my appointment!"

"That guy is a rusting idiot"

A: "I think my girlfriend is cheating on me"

B: "Rust!"
by WaxNWayne July 30, 2023
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Rust is a game where you need to uninstall before you get too hooked
by its rust, deal with it August 23, 2019
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Rust is a very unfunny person, he is bad and not rad. He always has a camel toe and has a very oddly shaped head. He is very tall and takes everything seriously. He is built like a dump truck. He probably has dandruff too.
Wow Rust is so camel toe
by HickySticks November 5, 2019
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A map from Call of Duty Modern Warfare 2 that has been reborn in two other Call of Duty games. Infinite Warfare, and more recently in Modern Warfare 2019. The birthplace of 1v1’s and the infamous phrase of “1v1 me Rust faggot!”
Nathan- Yo 1v1 me Rust faggot!
Steve- Aight bet. What COD?
Nathan- MW2 duh, Intervention only.
Steve- No shit Sherlock.
by Aligator420 June 5, 2020
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