Green’s Dictionary of Slang

(US black/drugs) top-quality marijuana.

1999		T. Leonardo ‘College Nationals 1999’ Writing Archive 🌐 For several teams, the added rest period helped them recuperate. For me, it was an opportunity to get kashnickered on kb in the rented 4x4.
2000		Ebonics Primer at www.dolemite.com 🌐 KB Definition: Kind Bud; the best quality marijuana. Example: Mah homies be rollin wit tha KB shawty.