Also known as: ヴァギナ・デンタータ
When a woman's Pussy contains Sharp Teeth; vagina dentata is Latin for toothed vagina. It's derived from an old wives tale designed to caution men of having intercourse with a woman they don't know lest they risk emasculation. On Danbooru, this often refers to monster girls with teeth on their vagina.
The movie Teeth features a protagonist with vagina dentata.