Arkham Subreddit Effect

When a subreddit randomly goes batshit insane, with stupid shitposts and genuinely insane people. Originally from r/batmarkham, hence the name.

Guy 1: All of my favorite subreddits are being flooded with stupid shitposts. What the fuck does "is he stupid?" even mean!?

Guy 2: Blame the Arkham Subreddit Effect...

Guy 1: Why?

Guy 2: Just take a stroll through r/batmanarkham and come back after 10 seconds.