>>10428914It's really weird no one seems to know what it means, but maybe it's because my brain has been terminally poisoned by /v/. Secondary refers to a fan that is a fan of a series, but not via the original material. A "filthy secondary" to Fate would be someone that claims to be a fan of the series despite only watching the anime and playing Fate Grand Order, but has never read the original visual novel Fate Stay Night. I typically see it thrown around for anime adapted off visual novels specifically, but it also would be apt to apply it to say, someone that's a big Yoko Taro fan that's never played Drakengard or has only seen the Nier anime instead of actually playing the games.
Yes this is absolutely fucking autistic, and -mostly- rooted in elitism, but sometimes you do get people on an anymous image board that like to act like an authority on something they actually have no footing in.
My apologies for the off-topic posting, but maybe this will clarify some things. Please ignore the resident retard that's either delusional or faking.