One powerful and quite dangerous device, created by Satan himself, used to control the money and the minds of straight men from all over the world. Combined with a pair of boobs and a nice ass it could be even more evil and unresistable.
Girl: Let's watch Twilight.
Guy: Hell no! That movie is terrible.
Girl: You're such an asshole! You don't get any vagina/pussy tonight.
Guy: LETS WATCH ALL THE TWILIGHT MOVIES!
A vagina with teeth. I worry about the sanity of the person who came up with this idea. It is also used to describe a phantasm by which a man is afraid that his lover's sexual organs will irretrievably mutilate his prick.
"For some reason, when he saw the art on the Magic the Gathering card 'Roaring Slagwurm', Alexander was reminded of a Vagina Dentata."