The Octagon or "Octo" is a term used to describe an enormously large Female. The Octagon is in reference to the female's body figure. Octo's usually roam in packs and are commonly known to visit your local watering holes or all you can eat joints.
"Holly smokes Geary is leaving with the Octagon!"
"That Octo is going to smother that poor guy"
"ha ha ha you and the Octagon did what?