A very potent, expensive strain of weed popular in the northeast. Has a very unique taste and very strong smoke even though it burns slower then other strains. Can run up to 65$ an eighth. People often call what they are selling granddaddy purple when they are really selling a lesser grade of purple (i.e. grape goo, purple Kush)
"I just copped a P of Granddaddy Purple from the club"
"I got grapes yadida?"