fuck rust 

The scunge shit that's left on a mattress after years of being abused by an intense amount of fucking

John: "Hey Jude, look at all the fuck rust we've left on that Captain Snooze mattress of ours?"

fuck rust by barrycuda March 11, 2009

active undercarriage rust protection 

Marketing-speak for a chronic oil leak on your automobile - generally one that takes more effort to fix than the car is worth. Comes standard on most General Motors products since the early 60s, as well as Saab 900 series.

Click: Dude have you seen that grease spot on your inner fender?
Clack: Oh don't worry about it, that's just active undercarriage rust protection. Paid extra for it. I think.

active undercarriage rust protection by Buick Roadmaster June 5, 2011

Pussy Rust 

A crystal type substance that forms from a lack of cleaning, usually foul in smell.

Man:"Ugh whats that smell!?"
Woman:"That's just my pussy rust."

Pussy Rust by grizzly333444 August 1, 2011

1v1 rust 

The only way to settle Mw2 beef when someone calls your mom gay

Dude why did you spam the cal

I didn't bro

Your mom gay

1v1 rust bitch

1v1 rust by PhatLOnYoForehead November 24, 2019

knock the rust off 

A woman who hasn’t had sexual relations for a while

I’d knock the rust off that old cougars piss flaps!

knock the rust off by Bababooey77 October 28, 2021

bum rust 

shit
basically dried poop stuck on an anis

bye you rusty little bumcrack.
Orlando was giving it to Ficklestean in the bum, he yelled, "I can see your bum rust!"

bum rust by karl55655 December 3, 2007

1V1 me Rust 

1v1 me Rust: Refers to the game Rust not MW2

1v1 me Rust, pleb!

1V1 me Rust by DefNotJanna November 29, 2020