Top Definition
The residual by-product of burning hydroponically grown marijuana, found around the inside of smoking utensils, most commonly pipes. similar to resin but with a better taste and less ill effects from inhaling it.
"This pipe is cashed but there's plenty of dresin!"
"Damn, dude! You smoked ALL the dresin!"
"This pipe is heavy with dresin."
"I'm all out of bud, but I have plenty of dresin!"
by vjcrew February 14, 2010

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