Yonic counterpart to phallic chastity device. Intended to apply to any chastity device with the apparent intent to restrict a subject's access to a sexual orifice (most typically a vagina) of the subject when the device is in use.

More simply: Does it seem like a present device is there to do chastity device things to a vagina? (or other hole based sexual cavity) (regardless of if that device is currently in a position to perform that function)