literal definition: smelling bad or reeking

slang: disgusting, bad, or unappealing.
Bob: He has pimples all over his face.

Joe: Musty!!
by ainm-cleite November 11, 2014
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A friendless human characterized by a big (and we mean enormous) nose and excessive amounts of dandruff. This poor creature's sole purpose is to make other students feel better about low test grades.

Currently, the owner of Musty's nose is Jonnadiah, but the deed is often passed around in exchange for small sums of money (or Spicy Chicken Sandwiches)
Student: Ah, sh*t, I got a 69 on the AP Euro test. What did you get Musty?
Musty: 42.
Student: Well, at least I'm not you.
by Jonnadiah December 13, 2004
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Not really the sweaty smell as you all thought but it's a person on the internet who looks unkempt and looks like they could smell sweaty. People who has done something or said something to get other people mad through the internet has been called this. If you're a pick me then iykyk
Random person on the internet: Dixie you look Musty
Charli Damelio: Hey shut up :)
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A scent of various degrees, ranging from mild to intense, deriving from a mixture of animal, human, or plant secretions, naturally occurring oils and or bodily fluids. Characterized as a combination of sweaty, oniony, fishy, urine, semen, cummy, danky, funky scents. Daily Glandular activity, fluid release, oil secretions, dead skin, blood, or bacteria produce these scents in humans and animals around the or within the: Arm pits, testicles, penis, urethra and anus of the Male and the Arm pits, anus, labia Major, labia minora, Clitoris, Scenes gland, bartholins glands and cervix of the Vagina, and under the fold of the breast in woman.

These scents can repulse or deter other people, animals and predators. And in some cases it is reguarded as pleasant pleasing and alluring to encounter. Sometimes desired by some as it is a aroma signature of someone's presence. It is also a natural sexual aphrodisiac for humans and animals. In the wilderness animals track each other by these scents for various reasons. (Territory, mating, predators, alliances, dangers, food, shelter, offspring etc).
Before showering, Aaron smelled very musty after playing basketball with the team yesterday.

After yoga practice today nicky decided to hurry into the shower because she smelled a very musty scent emitting from her panties and her yoga pants. Her menstrual cycle was starting to begin.
by Michael Melodiq Walker November 28, 2018
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smelly, sweaty,dirty person who hasn't taken showers in days and has an odor
Edmund, you're so musty. Please take a shower.
by dragonboat September 27, 2010
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