The girls have a song that includes the phrase "Yippee Cay Yeah." They sing the whole song with glee.
Because I am of what is delicately called "a certain age," I finish the sentence in my head with an unrepeatable phrase.
Think about it.
If you didn't finish the sentence in your head, go find someone who has seen the first Die Hard movie. Ask him/her to finish the phrase "Yippe Cay Yeah." It's not like Bruce Willis just says it once. He repeats it over and over again. Now you know why I cannot repeat it out loud, but it always plays in my head.