Define Filthy Casual Meaning

“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.

A person or gamer who is identified as a noob in either pc or console video games. It is most commonly used as a term of frustration towards a fellow gamer in a battle or game/party chat. Term originated with the WOOD clan of the Southern Appalachia Mountains in 2014.

"Filthy fucking casual n00b fag" originated from Collegehumor's "The Adventures of Butthurt Anime Fan".
DJ S3RL created a song using video and voice clips from the video called "Casual N00b"
It seems to be used in a sentence as an insult against people that think anime or a certain show is perverted.

S3RL - Casual N00b --- watch?v=Kzv0FVKcZ8A
The Adventures of Butthurt Anime Fan --- watch?v=8mQScjlXbBE