1
only applies to
中2, 中二
second year of junior high school;second-year junior high school student
abbr. of 中学校2年(生)
私は中二で学校を退学した。
I dropped out of school when I was in the 7th grade.
2
behaving in a way characteristic of teenagers going through puberty, esp. by being overly self-conscious;2nd year of junior high sickness
See also:
中二病 (ちゅうにびょう)
Other forms
中二 【ちゅうに】 · 厨二 【ちゅうに】 (ateji (phonetic) reading) (rarely used kanji form)