Mustfy 

Cat Shaffer a kiddy toucher

Tyler W is a mustfy

Mustfy by DevilsSon6969 June 11, 2020

Mustayeen 

The greatest person ever. Makes everybody drool (guys and girls alike), but is determined to stay an eternal virgin. He is vulnerable to STDs due to his micro-penis

Friend: "Yooo look at that absolute sex magnet!"
Other Friend: "That's the holy Mustayeen bro"

Mustayeen by faze_mahfuzez_ash March 30, 2020

musty bitch 

A skanky female, ages teen to death. They annoy the hell out of you but most of all are gross, stanky, or just fat.

That musty bitch just got fingerprints all over my iPad

musty bitch by Pussy Feind February 1, 2016

Crusty Musty Dusty Rusty

A "roast" used by Roblox kids who can't roast.

Person 1 and Person 2 have an argument
Person 1: *comes up with a good roast*
Person 2: Shut up you crusty musty dusty rusty whatever

Crusty Musty Dusty Rusty by Maxgamer345 July 13, 2023

musty cum fart 

After one has anal sex with his partner he/she lets out a fart after being came in people often describe it as a musty smell hence the name musty cum fart

Man #1: oh god
Man #2: what?
Man #1: I just remeber when pyper let out a musty cum fart last night
Man #2: ew why did you have to tell me?
Man #1 you asked you dipshit

musty cum fart by Mr.Big but skinny penis August 10, 2018

musty slap 

When a man lathers one of his hands on his testicles, giving them a warm and sour texture, and in a light, playful manner, slaps another person.

John was being a little bitch at the game, so afterwards I came up behind him and gave him the old Musty slap

musty slap by The guy on the couch. June 8, 2009

musty hole 

An asshole that has not been properly cleaned before anal sex. The asshole is still steaming with feces and other nastiness. Stank, smelly, and otherwise unpleasant.

After Mike took a dump he left shit all over the handle of the hammer after shoving it up his asshole.

Dude, she must have had a musty hole because when i pulled out my dick was brown

musty hole by chazafor September 9, 2009