"Filthy Casual" is a term used on message boards and in comments to negatively describe a gamer who only plays casual games, or a game in any genre that requires a low level of commitment and often has simple gameplay.
The term originated on 4chan's /v/ (video games) board by hardcore gamers who view people who play casual games in a negative light. The first archived use of the term was posted on August 30th, 2008 in a parody thread about how an average discussion plays out on the board.
By April 2009, the term had spread to other boards on 4chan, including /m/ (Mecha), where a poster was called a filthy casual for admitting he or she enjoyed the anime Toradora!. Throughout 2010, the phrase appeared on a handful of other boards including /a/ (anime & manga) and /tg/ (traditional gaming). Also that year, "filthy casuals" was used in commentary about people who play Facebook-based games on the Escapist forums and on a Destructoid community member's blog. In December 2011, the first tagged image macro depicting a stereotypically nerdy looking male with a caption referencing filthy casuals was posted to Tumblr
On April 10th, 2012, Josué Pereira of the webcomic Nerf Now! posted a strip comparing the gaming habits of filthy casuals vs. self-proclaimed elite gamers (shown below). That same day, it was reposted to the /r/Gaming subreddit, where it accrued 505 upvotes, 363 points overall and 72 comments before being archived. In late 2012, references to these types of gamers were made on the /r/Circlejerk subreddit and World of Tanks gaming forum. That November, the first Facebook fan page dedicated to the phrase launched.
On January 21st, 2013, a /r/FilthyCasuals subreddit was created, but has only had one submission as of May 2013. A week later, a second Facebook fan page was established. In early 2013, discussions and image macros about these types of gamers have appeared on Gamespot, We Know Memes, Tumblr and FunnyJunk.
 Foolz Archive – /a/: If this is too much for you, just go back to watching Naruto and moeshit, you filthy casual scum. (unavailable)
 Reddit – /r/circlejerk: Reddit, why does society look down on gamers? Hang on a sec, I see some stupid filthy casual playing ANGRY BIRDS on their phone, I'm gonna go tell them to grow up and be a REAL GAMER. October 10, 2012
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