The most potent form of marijuana; marijuana that contains crystals.
by Judah February 17, 2005
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When you use a grinder it separates the weed into two parts: The ground up normal weed, and the keef (it seperates them with a fine screen). The keef is normally the very edges of the weed and other small bits of the plant which contain high amounts of thc on/in them. The normally light green powdery substance contains a much larger amount of thc per milligram than the same amount of full buds.
Put some keef on top of this bowl so we get high as fuck!
by Nachomccrotcho April 13, 2008
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(verb) To increase the awesomeness of something (in general), as keef added to a bowl makes it kick-ass.
Dude: I just put Amaretto in my margarita.
Friend: Way to keef it up!

I totally keefed my rig with new wheels and a 10 speaker sound system.
by keefing November 2, 2013
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Either the crystals on high-quality marijuana or, alternatively, the yellow pollen of the male plant.
Also as an adjective, to keef nuggets, to remove the crystals from nuggets.
Dude, your herb has been keefed.
by wachagonnado? April 11, 2003
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The highest amount of THC from Marijuana. Made when marijuana is grinded and the THC crystal is sorted from the rest of bud
This keef has got me chokin but blazed
by Jolt January 1, 2004
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