godan verb (-ru), intransitive verb
get hooked on; become obsessed with
Internet slang for becoming deeply absorbed in a hobby, game, series, or fandom. Often used with に or で to mark the object of obsession.
最近、あのアニメに沼ってる。
Lately I've been totally hooked on that anime.
友達に勧められたゲーム
I got completely obsessed with the game my friend recommended.
godan verb (-ru), intransitive verb
be stuck in a slump; struggle to progress
Video game slang for being stuck at a certain rank or unable to improve. Often used with で to indicate the rank or situation.
ランクマッチで沼ってて、なかなか上がれない。
I'm stuck in ranked matches and just can't climb.