Hydro Grand-daddy Purp. Indica dominant weed. Same thing as Granddaddy Purp except its grown by a hydroponics system making the weed more potent. Non-frequent smokers will get knocked on they ass after a couple hits.
"Ayy breh lets hit up the club in the Sco Im tryna get some HGDP"
"fuck that I get it Cheaper in Oakland"