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A high-grade strain of cannabis; bud with a really good head high; also known as headies
"Dude, how much for an eighth of that headfunk?"

"You good on some of that headfunk?"
by b. real October 20, 2008
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a term used to describe marijuana that is covered in keef with barely any leaves and tight buds.
Oh damn check out the head funk in this issue of High Times
by KayaKonsumer March 04, 2009
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