Green’s Dictionary of Slang

(US drugs) a potent strain of marijuana.

2008		Urban Dict. 14 Oct. 🌐 Shiskaberry should be plump, dense nugz; with red/orangish buds. Should look like a long skewer of berry green goodness.
2014		Young M.A. ‘Brooklyn Chiraq Freestyle’ 🎵 Got shishkaberry, got cookie kush / Got white widow, a whole pound of that.