(adj.) used to describe someone or something that has homosexual tendencies and/or qualities.
Man 1: My New Year's resolution is to stay away from girls.
Man 2: Dude, that sounds kinda brokebacky to me!
Man 1: What do you guys think of this shirt?
Man 2: I think it goes really well with your eyes.
Man 3: Yeah, but I wouldn't wear it with those shoes. Here, borrow mine.
Man 4: WOW! That was very brokebacky!