Well, I do live in Oklahoma, so yeah I know some OU fans.
My point was that the "Sooners" illegally jumped the gun before the land-run to get first dibs on parcels of land that were originally allotted for the displaced Indian refugees. Many of the skins that I know, cheer for the team with an outlaw mascot that helped push the Indians off their land, again. And yes, they often refer to one another as skins when speaking in the third person.
For the record though, I am an OK State fan second, Bills fan first!