- (North America, idiomatic, colloquial, childish, pejorative, taunt, often humorous) [c. mid 20th century?] 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 received some supposedly deserved minor punishment or misfortune (a schadenfreude).
Apparently from the longer childish playground taunt sung to a tune particular to the taunt:
- I'm better than you,
- na-na, na-na, boo-boo,
- stick your head in doo-doo.
Na-na and boo-boo may be imitations of sounds a baby or young toddler might make. Boo-boo may also indicate boo-boo, a minor injury which leaves a mark on a child such as a scraped knee.
- Alternative spelling of na-na na-na boo-boo.