Look, it's all very well people saying "oh, I've never heard it used for vagina- you go ahead and use the name"
Can you, hand on heart, promise the op that her daughter will not be going to a school where that's what it means? And if you can't then it's just stupid to encourage anyone to use the name. .Oh and the "kids will always find something to tease about" is stupid too. Of course they will, but they won't have to look far if you send your child to school called vagina, will they?!
Honestly I think some people have just forgotten what it's like to be a child!