The area between two incredibly saggy boobs that you can seemingly slide your dick through if you're brave enough. There seems to be no connection between these boobs like a normal woman's. In other words, it pretty much looks like you took a chubby but flat-chested prepubescent girl and tacked on both of your dead Grandma Betty's tits with a blindfold.
Chris: Dude, look at her Red Sea. It's looking wider than usual.
Nick: Man, I wouldn't want to put my dick anywhere near those things.