a motto used by guys who are to insecure to talk to a girl and/or cant keep a stable relationship with a girl, when one of their friends gets into a serious relationship with a girl he is really in love with, and she loves him back. especially happens when the couple spends a lot of time together, and the guy's friends start getting jealous that their friend is spending what they feel is to much time with his love, and not enough time with them
guy 1: yo, we be going partying tonite brother.
guy 2:dude, i told you, i got a date tonight with michelle, i told you earlier today, im taking her to the movies.
guy 1:naw nigga, what about bros before hoes, its brotherhood.
guy 2:i told you several (raises voice a notch)times now that im busy, ill be out tommorow night.
guy 1: but bros b.....
(guy 1 hangs up)