Rusty ass 

If you rust someone, you half trust them. You usually trust the person but you are fully aware that they can be shady.

Wow, be careful around Tom, he's kind of a rusty ass...

Rusty ass by yunglilboo June 2, 2015

RUSTY THICC ASS 

RAKES ASS IS THICC AS HELL

IDK I WAS TOLD TO DEFINE RUSTY THICC ASS

RUSTY THICC ASS by Animdoge October 16, 2017

Rusty Asshole

(Noun)Feces residue around the butthole that remains after a insufficeint whiping.
(Noun)When when you lick the crust off of someones rectum.

"Yo my girl gave me a rusty asshole."
"Yo son that kids gotta real rusty asshole."
"Yo, I ran outta fuckin whipes, now I gotta rusty asshole."
"Hey, my girl wants me to give her a rusty asshole tonight, I dont know if I want to though."

Rusty Asshole by Joe Cataldo November 15, 2004

Rusty Assange 

Anal sex by surprise

Drew fell asleep on the couch at the party. When she woke up, Ty was giving her a rusty assange!

Rusty Assange by BadHorse47 December 22, 2010

Rusty Assassin 

A sexual act in which one engages in surprise, consensual coitus with a partner, where he and/or she sneaks up behind the target and begins to perform any type of penetration, as the second partner releases their bowels. The defecate may be purposeful or not, either way the instigator or “assassin” will be covered in excrement, thus the pre-fix “rusty”, as it gives the appearance of being covered in a splotchy brown substance.

“Peter attempted to make love with me last night, but after some spicy Indian food I accidentally made him a rusty assassin”

Rusty Assassin by botmizzlejay January 2, 2021

ass rust 

rust-shit

uhh she smell like ass rust!

ass rust by aLofsnaLs December 31, 2011