a name you call people to annoy the shit out of them.
"you're a crusty musty"
"shut up"
"no, you shut up you crusty musty"

or

"stop picking your nose crusty musty"
by xx_Maryannslover_xx February 15, 2012
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person1: omg look at shigaraki!!! hes so cute
person2: meh he has crusty musty lips
by sxmp August 13, 2021
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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
by Maxgamer345 July 13, 2023
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Used to describe a person who showers twice a week , repeats the same garbage outfits, and doesn't brush their teeth at night. They also have warts on their bodies. Can be low-key sociopaths.
Jake Paul looks crusty, musty, n dusty.
Bryce Hall looks kinda crusty, musty, n dusty, but he could still get it 😼
by erika_xoxo November 3, 2020
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someone who is crusty musty dusty flusty, is a person who is literally so weird and disgusting and quite revolting.
Ew look at that crusty musty dusty flusty lookin ass bitch over there tf?
by thatguycalledcrusty April 25, 2022
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Someone who has never touched soap, doesn't know what a toothbrush is, and is usually a discord/reddit mod, or a snowflake keyboard warrior on twitter.
by Light Yagami aka Kira June 21, 2023
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The very delishable food
I ate the crusty musty dusty toes for dinner
by OOGA MAN November 17, 2022
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