The 3-6 rule is the only exception to the bro code, ( but only if both bros have agreed upon it)
The rule is that after a bro breaks up with a girl the other bro has to wait 3 weeks before he can officially get together (date) with that girl. After that 3 week he has to wait another 3 week to bang her. Thus making 6 weeks.
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.
Basically this rule states that you have to take a shit within 6 seconds. If it takes you any longer than 6 seconds, it's considered a bad day. So you better start pushin!