Pulling off the Des Moines Surprise, Sioux City Superman, and Topeka Destroyer all at the same time.

Essentially, you have to straddle the girl's face as she's giving you head, pee in her mouth, poo on her chest, and vomit on her face.

Technically only theoretical because no one has proof of ever completing this rare trifecta.
Dude, I was so close to the Midwestern Grand Slam. I pulled the Des Moines Surprise and Sioux City Superman off at the same time, but she moved her head before the Topeka Destroyer hit her.
by Superscope March 2, 2008
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