a stoners definition to a total looser who is almost unbearable to hang out with and the only exception to hanging out with him is "the 6 gram rule", meaning you are never to hangout with him unless he has 6 grams to smoke with you and your friends.
friend #1: Hey guys keith wants to chill with us tonight.
friend #2: Does he have 6 grams?
friend #1: Uhh, let me check.....No...
Friend #2: "6 Gram Rule" no exceptions.
friend #1: Okay il tell him to just fuck off.