Circle Jerk
"Circle Jerk" is internet slang for a self-reinforcing feedback loop in which a community keeps upvoting its own inside jokes, catchphrases, and beliefs until every thread turns into an echo of itself. The label jumped from offline slang into online discourse through Urban Dictionary in 2003 and became a Reddit institution after /r/circlejerk launched in December 2008.
Overview
The "Circle Jerk" label pins down the pattern where a tight-knit online community keeps rewarding the same set of takes with upvotes and repetition until newcomers cannot post without repeating the script3. Urban Dictionary's top entries frame it as blowhards who "end up agreeing with each other's viewpoints to the point of redundancy, stroking each other's egos," a deliberate parallel to the sexual origin of the phrase2. On Reddit and 4chan the accusation stuck, thrown at any subreddit whose front page had flattened into predictable karma-bait4.
How It Spread
How to Use This Meme
Calling a thread or subreddit a "circle jerk" is a shorthand accusation that participants are repeating the same popular takes for upvotes rather than contributing anything new2. Users typically drop the label in reply to a chain of near-identical comments, or attach it as a subreddit suffix ("Xcirclejerk") to signal that the sub exists to satirize its parent community's tropes4.