Is there a casual/slang term in Japanese for an old geezer who's a hardcore otaku? I know terms like erojiji and such but there are more referred to old men who are just perverted in general, but what about perverted old otaku?
Cross-posted to Japanese.SE: Is おたくじじい a proper term to describe an old man who's into anime or is there another slang term for it?– Aki Tanaka ♦Apr 17, 2021 at 12:39
1Define old men. When does one becomes old? (sorry for being rhetoric). I can think of "kimo-ota" or kimochi-warui otaku which roughly translates to disgusting or filthy otaku. They are kind of dirty, unhygienic and unemployed people who are obsessive about anime. Although I don't know the correct term for "Perverted old otaku" in japanese but it may come under kimo-ota.– Fumikage TokoyamiApr 18, 2021 at 5:28
Kitanai rōjin is what I have found about from your question.
It means dirty old man too if you want to translate.