a nickname of justin bieber for looking musty and not taking a shower (seen under popcrave and popbase replies often)
ended mustin period”
“mustin can’t take a shower
by mustin beaver December 21, 2020
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jokingly justin, frequently used under popbase’s replies
ended mustin!
i’m sure mustin didn’t took a shower the whole day!
by mustin beaver January 5, 2021
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a nickname for justin bieber for looking moldy and not taking a shower, as well as being a misogynist, racist and disgusting man
by sherlockt December 24, 2020
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One of the most musty looking artists in the music industry who makes trashy music like "yummy"
He did got better by using unnatural products, recommended by his wifey
Mustin never showers.
by December 24, 2020
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I can't believe they made a Mustin!

Antonym - Mocha
by sublime4510 July 11, 2008
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Mustin is used when Justin Bieber looks ”musty”. But its important to add that he looks ”musty” because of his lyme disease. It affected his skin with acne and his mental health so that he did have the energy to take care of himself (like showering and eating properly). So using the term Mustin is mocking him with his disease.
Justins hair looks greasy and look at his acne eww Mustin needs to shower”

Also used as a drag on stan twitter:
”Mustin tanked”
by dejavubiebs November 30, 2020
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A person of crazy quality. Enjoys weed and Sonic the hedgehog a little too much. Will most likely be found next to a bong or a pile of weed. Luring him out of his cave is tricky but gay porn and weed will do just fine. He is also partial to dark ale's and beer. Never give rice wine....not a plesent experience.
"Lay out the snare" said miss thing. "Use the nugg and batters up as bait" she told us. "The Mustine is a wiley bastard"
by Darth_Caliban June 28, 2008
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