Just a little note to clarify things. I think people in here are confusing VBH with gigantomastia, which are two different conditions. Granted, the line between the two is a bit blurry, but generally speaking they can be differentiated.
VBH can technically be applied to pretty much every single woman that's posted in here. It basically is the generic term to describe any woman who naturally has large breasts that could be considered out of proportion from the rest of her frame. It's important to note that this is based on the wider viewpoint of our larger society, not boob fans like us, for whom super-stacked babes are the norm.
Gigantomastia is the term that's applied to the women you see in the headless medical photos with the obscenely overdeveloped, misshapen, odd-sized and (IMO) difficult to look at breasts that appear as if they are tumorous and infected.
For instance, this is a woman who has classic VBH (and who could make a mint for herself if she ever decided to go into modeling, instead of having them lopped off) and the other women above with the boobs that are almost as big as the rest of their body and that hang to the floor have gigantomastia.