The set of standards and guidelines that all guido's must follow in every aspect of their lives
"Dude I don't care if you ran out of hair gel, you go to the store and buy more. To go out clubbing without spiking your hair is definitely against brotocol."
Is a set standard that Bro's have that covers the type of relationship they have together and what is allowed and not allowed and/or what is considered to be that of a homosexual nature
Bill: Did you see how that guy just helped out his bro by stopping him from going out with that fat chick
Dan: uh yeah you dont have to tell me, its in the brotocol