porcelain rust 

Fecal residue left on the inside of the toilet, either above or under the water, for more than 3 days.

Dude, someone totally butt scuffed the toilet here.

Naw, dude, thats porcelain rust.

porcelain rust by Notorious B I Scuffer February 15, 2010

crop rust 

When you defacate yourself in a crowd unbenounced

I crop rusted on the subway today.

crop rust by Brieolhg June 17, 2017

Freezer rust 

When a dumbass lets a Dairy Queen ice cream cake melt and then put it back in the freezer, the cake gets freezer rust.

Why would you let the ice cream cake melt and put it back in the freezer last week, dumbass, now it has freezer rust

Freezer rust by Urban cowgirl December 23, 2017

Bust Rust 

When you've ejaculated to the same porn so many times that even though it still excites you theres no more love to give.

I need some new porn cause I've got a serious case of bust rust with this one.

Bust Rust by CallmeDeth November 5, 2020

Cosmic Rust 

The transformer's version of Thanos's snap

OK weak protoforms don't bother sentinel or he will use his cosmic rust gun on you,you all know what happened to ironhide.Don't mess with him or you will die like jetfire said:falling to pieces

Cosmic Rust by Anonymous bounty hunter August 4, 2021

vital rust 

a roleplayer server filled with the greatest roleplayers in rust!

player 1: i really want to practice my 5 meter ak spray, where can I test against AI?
player 2: you should play vital rust! that server is filled with AI roleplayers!

vital rust by bignamer4335 October 14, 2021

twig_rust 

the best youtuber and the best ak beamer u will ever see (rust)
likes booba and pog pussy

youtube.com/twig_rust is a great channel

twig_rust by poggersm8/twig_rust January 11, 2022