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Adj or Adv. describing the mental state of depression which follow a bout of chronic constipation.
After 5 days without being able to relieve himself, a dark sadness swept over the man as he gave into his inability and became noticeably blum.
by Sidarthur January 03, 2010
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When you're girlfriend is on her period and on the pill and you just don't give a fuck but don't have a condom and have sex with her anyways. the resulting mix after you get off is known as blum a mixture of blood and cum.
yo dude just had sex with sarah and shes on the rag

ewww dude did she drip blum everywhere after?
by beau gosse May 29, 2011
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A nickname for a bad-ass person who works on classic cars & motorcycles. (also rad upholstery for any vehicle) It's quite possible for a Blum to show up on TV, Velocity Channel.
"Aw, did you see that new bike Blum built?"

"yeah, fucking dope cafe-racer style."
by donttellmehow February 26, 2013
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A mixture of blood and semen produced by having sex when a woman is menstruating.
"Shit, shit, shit! I've got blum all over the sheets."
"Aaaaah! It's all over my knob!"
by xBlackFacex August 14, 2011
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A person who's often feels left out... A third wheel.
Jackie: I hate hanging out wit you and Janet, I always feel like a third wheel.
Jane: You're such a Blum
by Blumkinsforeveryone March 25, 2010
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