Nani means what in Japanese. It can be used as a joke or a question, depending if they get the joke or not.
by uahgkjiubhakbwijgujkijp4gwe February 1, 2021

O-Nani (noun) an Australian derogatory slang term used to refer to American friends/housemates, meaning wanker, derived from onanism and yank.
Hey Dave, what are you and the O-Nani doing tonight? Coming to the pub, or will you keep him locked up in his basement?
by Theonanonymous Douche June 2, 2021

Hey, Malala, why bother differentiating between Pakistanis and Afghanis and all them sorts? Y'all just a bunch of ghani-nanis anyway.
by bigneenthequeen May 27, 2023

'nani' is the Japanese translation of 'what' in English. To add affect to the word, you can add '?!'. This famous line comes from a character called Kenshiro from 'The fist of the north star'.
by omaewamoushinderu May 22, 2020

Nani is Japanese for "What" and is used in english sometimes as a dank comeback for when someone says something wired, stupid or just uncomfortable to thing of.
"i have 17 Mongolian children locked up in my basement" Response: "NANI?????"
"私はあなたが持っています私は持っていません" Response: "Nani?"
"私はあなたが持っています私は持っていません" Response: "Nani?"
by PornWatcher465 June 3, 2020

Whatever Nerd: Hey Jack, wassup idiot.
Tom: Who the hell is Jack? NANI me!
Jack: I’m Jack! NANI WN (Whatever Nerd)
Tom: Wait, Jack, you’re the WN. NANI me!
Jack: SYKE!
Tom: Who the hell is Jack? NANI me!
Jack: I’m Jack! NANI WN (Whatever Nerd)
Tom: Wait, Jack, you’re the WN. NANI me!
Jack: SYKE!
by xNinja Mocked Dream March 7, 2022
