Top Definition
Slang for some of the illest weed money can buy. Any thing passed off for fibergrass should be primo shit and fuck you up good. You have neen warned, it has been known to cover up deals of... Washington Heights Haze, Ak47, White Widdow, and White Rhino etc...
Yo i need sum ill shit wat you got?
Fibergrass is tha only thing i been stocking on shelves.
by The IceMan2000 January 27, 2006

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