used to describe someone who is old and weird.
used to describe someone who tries to be quirky but in fact is just lame. especially when they always make 'ur mom' jokes.
Jane: "Hey. Is that your new coach? He looks a little old though."
Amy: "Yea, unfortunately. He's musty, crusty & dusty. He always likes to nag us but doesn't train us that well either."

Ben: "Do you know who's my favourite person in the world?"
Tim: "Who ? Is it me?"
Ben: "LOL no. It's your mom"
Tim: "WTH. That's not that funny. You're musty, crusty & dusty."
by i like ur mom March 27, 2022
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A common roast mostly used in the Roblox Community. Also used a lot in the common trope 'Roblox Story But the Main Character has a brain'. Also can be extended with other words that rhyme like Ugly, Disgusting, Rusty, and more
Player 1: Man be quiet
Player 2: SHUT YOUR MUSTY CRUSTY DUSTY ASS UP
by urbandici September 28, 2023
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An “Eiffel Tower” performed by the homeless
“Damn did you see olhobo chase in the middle of that musty crusty double tap?!”
by stripeddinosaur October 7, 2021
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that one guy in the back of the class who's hair looks like a bird nest and always has sweaty ass hands
girl 1: that guy in the back of the class just called me a slut
girl 2: dw hes a crusty musty dusty sewer rat
by ahaha_slay_yee November 8, 2022
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