by Buzzcocks Babe December 06, 2010
by MCJOKEZ January 04, 2010
A Na Na is a loud mouth, know-it-all, hateful big sister who scares you, screams when you enter her room, slaps you upside the head, makes fun of your ugly girlfriend, and makes the best food when she's pissed.
You've pranked me, slapped me, told everyone about my bald girlfriend! You're no sister, you're a real Na Na!!!
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