Alternative spelling of 中二病

(Internet slang) a “sickness” in teenagers characterized by sophomoric, edgy, and/or pretentious behavior (trying too hard to be special in unusual ways)

characterized by such behavior

(swords) an inscription of two characters

(taxonomy) binomial nomenclature

(typography) the iteration mark 〻, used to repeat kanji, historically mostly kanji with kun'yomi

double room

going back to sleep (e.g. after waking up in the morning)

(idiomatic) unhesitatingly without dispute

being roundabout or indirect to the point of being ineffective, often irritatingly so