Top Definition
The sound made when someone knows what another person is about to do. Used primarily to taunt the other person.

A way of saying "hey doofus, I know what you just picked. Get ready to be schooled."

Used especially during video game playing with multiple-choice games such as Techmo Superbowl.
After I said "nee-na nee-na", Mike knew he was in trouble....
by Phil January 27, 2005
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