The concert vagina is a woman who pretends to be one of the guys in order to get attention from a group of single and/or "unavailable" men in situations where the female/girlfriend element is intentionally absent. Akin to a concert pianist, a concert vagina earns this title by consistently positioning herself at center stage in a group of enthralled spectators.
Trademark moves of the concert vagina include inviting herself to poker night and showing up in a miniskirt holding a six pack of your favorite beer. In this manner, the concert vagina is able to advertise herself as the best of both worlds. Don't you wish your girlfriend was hot like the concert vagina?