Fabedaf
Fabedaf is a made-up word that can be anything, but it's usually just a way to sound smart without knowing what you're talking about.
I told my friend, 'This game is fabedaf!' He asked, 'What’s that?'
In class, I said, 'The answer is fabedaf!' The teacher said, 'That’s not a word!'
My mom said, 'I’m going to the store, fabedaf!' I said, 'Why?'