doodah
/ˈduːdə/ DOO-də
Definitions
1. noun
a vague or unimportant word or phrase, often used to fill a gap in conversation or to avoid a sensitive topic
“He muttered a few doodahs to change the subject.”
2. interjection
an expression used to emphasize a point or show excitement
“Wow, what a great view! Oh, doodah!”