The Bro Code is a set of sacred rules honoured among millions of bros throughout generations. The Bro Code is not defined as it varies amongst different groups of bros. Although, there are still some points that are in all sets of Bro Code, this includes:
Family is off limits
Exes are off limits
If a bros girlfriend asks about where he was, you know nothing or he was with the bros
If you see that a bro is talking to a girl and your slow friend is tagging along, its your duty no matter what to extract the third wheeler
Bro's girl: Hey, do you know where Mark was on Friday night?
Bro: *knowing nothing* Yeah he was with me all night, we went bowling with the guys
Mark: Thanks for covering for me bro
Bro: No problem man, its just a basic rule in the Bro Code
A way of life between bros. No matter what is going on, the bro code must be followed. The best way to explain it is when Butch stops the guys raping Marcellus Wallace in Pulp Fiction. Minutes earlier they were fighting to the death, but the bro code kicked in. It doesn't matter if it was Saddam Hussein in there, the bro code MUST be followed.
Even though they tried to kill each other, the bro code dictated that Butch could not let Marcellus Wallace be anally raped.
Guy: (Begins taunting Ronnie)
Ronnie: Come at me bro!
Guy: (more taunting)
Ronnie: No dude, you come at me bro. Hold your girl back and come at me bro!
Guy: (even more taunting)
Ronnie: COME AT ME BRO, NO YOU COME AT ME BRO!!
(Conversation repeats consecutively for the next 5 minutes)
(a fight eventually erupts on the boardwalk)