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1.
(informal)

Japanese for "What?"

You're always hearing this in anime and reading it in manga, and it's basically a simple response to anything confusing, offensive, or mysterious.

Can be used in virtually any situation. Plus you sound all cosmopolite if you can speak in Japanese.
1) "Nani?"
Trans: I beg your pardon?

2) "Nani?!"
T: Did you just say what I think you said?!

3) "Nani kore?"
T: What is this?

4) "Nani..."
T: This is all so mysterious and intriguing...I wonder what it all could mean.

have fun.
by noflo June 19, 2004
 
2.
Nani is Hawaiian it means Beautiful.
Nani is my sistahs name.
by Ma'alea808 March 28, 2009
 
3.
A mysterious species; one the rarest kind. Portrayed as free yet held in captivity to man-kind. Nothing you know too much about but somehow you can never get to know her quite enough; persona so loud you could hear her in the silence.
It'd be my pleasure to ever be aquatinted with someone like a Nani
by gogomojo March 22, 2011
 
4.
punani shortened

slang for vagina
james: woah man look at that slut
steve: she must hav a loose nani
by C-losh January 21, 2010
 
5.
When your girlfriend / girl threatens any woman who looks at you or try's to partake in any casual conversation with you.

When your girlfriend / girl is very protective of you or think's every girl want's you.
Guy1 - "Yeah, my girl almost fought this chick because she was looking at me!"
Guy2 - "Ah damn man, you got a nani!"
by Kahleel July 11, 2011
 
6.
a pathetic excuse for a football player
Spectator: "look at that blibbering vagina rolling all over the ground, he wasn't even touched."

Gomes: "What a Nani"
by insultingrock November 01, 2010
 
7.
Hindi for grand mother
How's nani doing today?
by IFXXavier June 26, 2005