chuuni 中二, 厨ニ

What is the meaning of chuuni in Japanese?

For starters, chuuni 中二 is the abbreviation of the school year chuugaku ni-nen 中学二年, meaning "middle-school, second-year," however, it's sometimes used to refer to a specific type of character or person.

What is a chuuni character in anime?

In this case, chuuni 厨ニ (spelled with different kanji) is an abbreviation of chuunibyou 中二病, "middle-school second-year syndrome," which refers to when someone acts and talks like they live in a fantasy game, in the manga world, with magic, evil organizations, and stuff like that.

Character: Dark Flame Master, Togashi Yuuta 富樫勇太
Anime: Chuunibyou demo Koi ga Shitai! 中二病でも恋がしたい！ (Episode 1)