In the US military, medical personnel prescribed motrin (ibuprofen) frequently and in large doses for any number of injuries or ailments. In the late 1980's and early 1990's before the generic version became available it was so popular that it accounted for almost 50% of military pharmacy prescriptions. The drug was coined the name "Vitamin M" due to its high number of prescriptions for US soldiers, sailors, airmen and marines.
Hey Boats, what did doc give you for your hurt knee?
He gave me light duty for a week, told me to ice it for 20 minutes 3 times a day, and take Vitamin M for 2 weeks.
by epimethius05 February 24, 2010
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Vitamin M is Money, Recommended daily allowances are measured in $.
Liquid Vitamin M would be cash on hand.
I'm running low on vitamin M?
"How much Vitamin M you got?"
by Manny Stiles July 21, 2006
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Although literally it is Folic Acid, Vitamin M refers to Marijuana. See also: Vitamin THC
"Dude, I've had no appetite lately."
"You must be low on Vitamin M."
by WTFDavidBlaine April 13, 2009
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Slang expression for the Maker's Mark Manhattan, the whiskey-based cocktail, which in this case, is specifically made with Maker's Mark bourbon. For some people the Maker's Mark Manhattan has the effect of stimulating lively conversation and artistic creativity; thus, it is considered to have a beneficial effect on the body and the mind in the tradition of a good vitamin.
I need to take my Vitamin M first, and then I'll call you.

cocktail, bourbon, whiskey, makers
by dahlingtheoriginal June 22, 2011
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A slang for mercury (Hg) which has been found as accidental contamination of certain vaccines. Widely used in Alex Jones lexicon
"Doctor, the vaccines for bird flu all have mercury in them"

"Thats not contamination, thats Vitamin M"
by The_JDH July 30, 2009
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A nutritional supplement administered to Joe from Mike.
Mike: Time for a warm shot of Vitamin M!
Joe: Oooh baby! <bends over>
by Falkan March 4, 2003
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