na-na na-na boo-boo
A taunt or putdown, typically used to indicate that the speaker believes he or she has beaten the listener in a competition or is better in some other way or in a general sense; or an expression of satisfaction that the listener has receive
... is that the educators out there aren't aware of this, they don't know it or what? Ms. Bolinger. It's like na na na na boo boo, make me do it. [Laughter.] ...