" So, we'll have a safe word, which you can use if it gets too intense," Warren explained."Okay?"
"All right," Praline said sceptically.
"What word do you want to use?"
Praline thought about it. He didn't want to choose anything that could easily be mistaken for "please keep doing that" so he said, "Supercalifragilisiticexpialidocious. "

― Marshall Thornton , The Perils of Praline: Or, the Amorous Adventures of a Southern Gentleman in Hollywood