na na nai 

a phrase made famous by musical artist dappy from N-Dubz, na na nai translates into english as - "Im a cock with a stupid hat".

"wheres my hat? i wanna be "na na nai" today when i go out.

na na nai by ChavBusters February 12, 2010

Na Na Nai 

This is exactly the term to use when trying to describe how much of a G you are when you get discounts at whatever showroom you go to! Na Na Nai!

boon-ilo:Yoo beleev Yoo beleev Yoo a G cuz yoo went to da park wif ure frenz 'n' letta shot off into da sky

zbud-mis: I believe I'm a G because I can spell correctly. Na Na Nai!

Na Na Nai by N-Slomz May 14, 2009

nananaitis

When you only know the famous part of the lyrics to a song and forget the rest. Symptoms include singing the first few lines enthusiastically, and then mumbling, humming, and stuttering during the rest of the song. People like this should either do some research or keep their mouth shut.

nananaitis victims

1: You're lipstick stains!...ehnanananana left side brains! dadadada wouldn't forget you!

2: When I was thirteen, I had my first love...jflsfn lnnfanlksksckmksmldsmfjlsnnvkslfsjlkxjvmekfmilfsaln above.

3: Hi, my name is! My name is! My name is! Slim Shady! Hi kids do you like violence? eh duh umm eh uh EYELIDS! wanna cough on me and do extract um erh.................did? try uh um er and get messed up life is? My brain's dead weight, trying blahblahblahblah but I'm ..uh bluhhhh PREGNATE!

4: Blah blah blah blah blah blah blah
Comin out your mouth with your blah blah blah

Oh wait, that's right...

nananaitis by BYAAAA! December 2, 2010

NANANAI 

Supreme expressionism. Can often be said randomly or when excited.

Expression of happiness or joy best when slurred in a deep voice.

Also famously used in a song by N-Dubz.

Mainly used in the depths of SW London.

Boy1: we got no chemistry test.
Boy2: yeahhhh NANANAI or NANANAAAIIIIIIIIIII (slurred - deep voice)

NANANAI by Gus Grant February 23, 2008