A bro who is not really part of your main group of bros, but is chillenough with some of your bros that he can occasionally hang out with your main group of bros.
The complete opposite of "mainstream." It IS a horrible play on words. It is a new way to refer to a hipster without them getting pissed off (cause hipsters hate to be called hipsters).
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi