the guy who everyone knows sells pot but is yet to be caught. He may possibly be your dealer, mostly likely grows his own stuff or has a large supply, often cheap sometimes medical
usually dosent smoke his own stuff.
person1: so who are we looking for?
person2: my Dr. Greenthumb
person1: oh that dude that stands in the ally by safeway with the afro and trench coat and box of lighters?
cop1:that guy in the hoodie over there is a Dr. Greenthumb
cop2: i know but he never has any on him or at his house.