A person addicted to Vaginas and usually randomly talks about them randomly in normal speech. Cootchie monsters are usually D-bags and don't really ever get a girlfriend
John: Dude, the opening of the X-Box 360 reminds me of a Vag.
Me: How? What?
John: It's to turn on and you stick things into it!
Me: Stop being a fucking Cootchie Monster, just because you cant get A GIRLFRIEND. Anyways, let me have some room, stop spreading out over the couch, your so-
John: Like a girls Legs?