a dare between males when one's sexual preference is in question. the challenge entails watching the film Brokeback Mountain, alone, naked, in the dark, and uttering the words "i dare you to move" to one's own penis. if by the end of the film, said penis has not moved, the challenge has been met.
steve: man, that guy's such a stud.
bill: oh yeah? i bet you'd touch your toes for him.
steve: nah, i can appreciate the studliness of a guy without being gay.
bill: i seriously doubt it and a twelver of pbr says you fail a brokeback challenge.
steve: oh dude you're so on!