A word that knows no boundaries. It may be used to replace unknown music lyrics, to reply to a question of which the answer is unknown, or to affirm any range of emotion from sad to excited.
1. "With arms wide open, dooba doobadoo ba doo."
2. "What's her last name again?" - "Doobadoo??"
3. "So how are you feeling after that breakup?" - "Doobadoo..."