The word ''What'' in Japanese, it is commonly used by persons who watch much anime or love Japan
-What iss the square root of 5.9866?
-Nani?
(Noun) The best person in the world.
Although it seems it is an adjective, using this as nickname will mean the person is considered the best person in the world.
That''s incredible Nanis!
'what' in Japanese, or a word said rapidly to annoy somebody
Anata wa mō shinde imasu. Nani?!
Pronoun; Nani?!
It means what in Japanese, weebs say it because they think it’s quirky.
Noun; Nani
It’s a Hawaiian style name, people with this name are typically teased for it on discord
Girl 1: “Would you just shut up about your anime?”
Guy 1: “Nani?!”
—
Human 1: “Were your parents weebs or is that just your nickname because you say what all the time?”
Nani: “Shut up. Shut the f**k up.”