An Okeetee can be either one or both of two different ways of thinking...depending upon who you are talking to at the time. Originally, it was a term used to classify a normal cornsnake that was captured in a specific locality...the Okeetee Hunt Club in Jasper County, South Carolina. They were noted for their particular look. Today, the look has been refined by selective breeding and specimens that fit that look may or may not be true locality Okeetees. Basically, the look is a normal corn (wild-type) that has rich coloration in both the saddles and the ground color as well as having thick black borders around the saddles. There is even a further break-down and you'll see the term "Abbott's Okeetee", because of one specific breeder that produced what many consider the perfection of the Okeetee look. This is an excellent example (and I found quite a few to choose from):
http://www.cornsnakes.com/forums/showthread.php?t=35179&highlight=Abbott
A reverse Okeetee is an amelanistic cornsnake that has been selectively bred to have the rich colors in the saddles and the ground color as well as having thick white borders around the saddles. Basically, a "reverse" or albino form of the Okeetee look.
Lately, I have been seeing alot of amels with thick white borders but light ground color also called reverse Okeetees, but personally, I don't think they fit the original description of the morph. This is what I consider a reverse Okeetee:
http://www.cornsnakes.net/gallery.php?catid=2&id=28