This is Bubba Hog (not, I'm guessing, his real name). He dances at Arkansas basketball and (I think) football games. I suppose that this is a character he created, a caricature that celebrates some aspect of Arkansasian "culture"… or maybe it's just a fat dude dancing. Either way, our world is a sadder place for it. I hate EDSBS a little bit right now for introducing me to Bubba.
More Bubba Hog available here. You sick bastards.