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."
1) A modern day tribute to Old Latin, vagina dentada refers to any female genitalia found containing teeth. Though commonly found in unattractive, unhygenic, and more-often-than-not un-do-able women, it is possible that a sexually attractive woman may in fact have a vagina dentada.
2) Any woman who has a vagina dentada.
1) That chick was so fugly, I bet she had a vagina dentada.
2) Kyle: Dude, how'd things go with that hot chick you picked up at the club last night?
Jake: She looked so hot, but when we got back to my place I discovered she was a vagina dentada.