沼ぬま落おち

noun, noun or participle which takes 'suru', intransitive verb

falling into a fandom swamp; getting deeply obsessed

Internet slang for becoming completely absorbed in a hobby, series, celebrity, or interest, often to the point of spending excessive time or money. The metaphor is falling into a swamp (沼) from which one cannot escape.

• あのアニメを見みてから完かん全ぜんに沼ぬま落おちした。

  After watching that anime, I completely fell into the fandom swamp.