We all have made mistakes. Bros always have each others backs. A Bro-no saves your bro from dating a disastrous girl straight from the beginning. If your bro says a certain girl is attractive, immediately say Bro-no. End of conversation.
Adam: Dude, she is so freaking hot. I think I might get her number!
Tim: (Thinks: ew) Bro-no!
1 week later
Adam: Bro, thank God you Bro-noed me. That girl ended up being a man.