Definitions by Bobby Fresh, Yo.

Blood Belching Vagina 

1) A menstruating girl's vagina.
2) Synonym for a stupid person.

Bobby: Dani, why are you being such a bitch lately?
Dani: I can't help it, I have a blood belching vagina!

Blood Belching Vagina by Bobby Fresh, Yo. May 3, 2008