What in the World?

Each day as naptime ends I greet my little girl in bed.
She wakes from her slumber either before or at my greeting.
A regular question upon her waking is "May I have snack and juice?"
Recently, Charlotte has begun to ask what I'll be making for Dinner because my prep work is part of our evening schedule.

Today, I replied, "I'm making Tacos for dinner."
"Tacos," she said." "What in the world are Tacos?!"

Did she say "What in the world?"...yup.
Where she gets that...I"ve asked and she claims it is from Nemo but a google.com and script check tell me NOPE.