Yesterday evening, after dinner, this happened...
Medium Fry: Mom, what does "frolicking" mean?
Medium: I just made that word up.
Me: You did not!
Medium: Yes, I did. I've never heard it before. I just made it up.
Me: That word was in existence long before you were born.
Medium (anticlimactically): Oh.
I realized too late that the perfect response would have been to ask her how I knew the definition of a word she'd "just made up."
She certainly keeps me on my toes...