What you exclaim when you see a very large and/or slutty woman, in reference to the size of their massive, cavern-like vagina. This usually followed by a diving gesture (Clasping the hands together and dipping the body forward, as in to "Dive in" to them.)
(Lauren and Mariah are walking behind Kaci in the hallway, who is a rather large, nasty whore. )
The disgusting valley of space between the legs of girls who are way too fucking skinny. These "gaps" are possessed by girls who look like 13-year old boys, and not real women. They are also generally flat-chested and all-around unattractive.
When I was walking up the stairs to English, I got stuck behind the girl with the gap, and it was right in my face! So gross.