Top Definition
slang for ketamine, an anesthetic used as a recreational drug
He was in a stupor from vitamin k.
by The Return of Light Joker August 30, 2010
1 more definition
Keystone, Getting your daily dose of Vitamin K.
"Man my body isn't agreeing with me today"
"Must have had a little too much Vitamin K last night"

"I have been have had such a tough week..."
"Sounds like you are having a Vitamin K deficiency."
by September 08, 2009

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