McSteamy

When you go to McDonalds and order a hot beverage and you have explosive, and intense diarrhea after enjoying your beverage.

David: "Hey you wanna go to McDonalds, dude?"
Jason: " Sorry dude, last time I went to McDonalds I got a beverage and had the worst McSteamy of my life."

David: "Dude, that's tough."