The Huffington Post, the online news and aggregation behemoth owned by Greek heiress Arianna Huffington, has a sideboob vertical. That is, it has a part of it's website dedicated to sideboobs: pictures of breasts (largely, we imagine, women's breasts), from the side. 

Sample headlines: 

PHOTO: Miley Cyrus Flashes Side Boob, Talks Sex Scenes & Losing Her Virginity, PHOTOS: Gwyneth Shows Off Some Sideboob In Sheer Dress, PHOTOS: Miley Cyrus Flashes Major Side Boob (seriously, there are twelve stories on the front page and three of them are about the 19-year-old pop sensation).

Basically, if you've worn a backless dress that's a bit too loose, you've probably exposed sideboob.

The section, with the URL www.huffingtonpost.com/news/sideboob (yes, it's filed under "news", at least in the address. It's under "entertainment" in the main hierarchy), isn't technically a vertical in HuffPo's own parlance. They reserve that term for the absolute top-level divisions of politics, world, sport and so on:

Instead, the site refers to it as a "big news" page, identifiable by the big name of the page along the top:

Which means that sideboob isn't as important as, say "politics" or "style", but is instead at the same level as "drug violence":

or "Barack Obama":

The web will eat itself.