A goal that is set and then agreed to by at least two bros.
Me- Joe, by the end of the year ,I will ride my bike all the way up that hill without stopping or dying.
Joe- I will too, your on, it's a brogoal!
When you and your bros are such cool bros that everyone is jealous of you bros.
Guy 1- "Woah do you see those bros over there? They look so cool I'm jealous!"
Guy 2 " Oh yeah they are total brogoals!"