Having a moment in life (as a man) that is decidely gay. Interestingly enough, what makes it that type of moment is the fact that the gayness of it is in no way a problem.
Example 1: Derek: "Wow that sunset is really pretty."
Derek: "You know, its just ....pretty"
Steve: "Dude, yer having a Brokeback Moment"
Example 2: Tom : "My favorite moment after working out is
showering with the guys. I love the
Gus : "Are you nuts? Dude, you are totally
having a Brokeback Moment"