Two of the Real World girls roll around in the mud with the Chicago Mud Queens, starting at 32:45. Decent.

http://www.mtv.com/shows/real_world_skeletons/real-world-skeletons-ep-3-three-way/1733334/playlist/#id=1733334

Thanks Rege. I think my computer has about 10% of the RAM required to play MTV's web videos, lol. There is a great scene from a 1993 sketch comedy show called "The State" where a guy introduces a mud wrestler to his parents. My screen capture software was able to grab some frames here and there; starts around 13:30

http://www.mtv.com/videos/the-state-season-1-episode-1/1567046/playlist.jhtml#id=1567046

I'm about 98% sure that's actually chocolate pudding... but they're wearing white in the first bit and I'm OK with that.

After washing off, they all go out and watch an O'Neill play and write insightful commentary on it for friends who couldn't attend. Very muddy, indeed.

I think it's reddish clay, and they're just mixing it to a good consistency. Look at how evenly it smears over their bodies, compared to the Gilley's pudding wrestling, where it coats them in sticky gobs.

Some good pics here of what I think is the same Mud Queens event.

http://www.eyegripping.com/?p=887