A prehistoric depiction of vulvae. From Wikimedia commons.
These days the vulva is often referred to as the vagina, which is incorrect and confusing since the vagina is the birth canal and the vulva refers to the external female genitalia. Do you call your vulva a vulva, or a vagina, or do you have some other nickname for it like "lady parts" or "vajayjay"?
Vulva. Although, I can't say I've ever used it in conversation. Conversely, I have heard myself refer to it's next door neighbour as "the old virginia". . . . possibly in jest with my nearest and dearest. LOL