adj., excessively apologetic; displaying tendency towards self-deprecation; contrived (esp. humorous) self-criticism.
Derives from the popular vLogging site http://www.youtube.com/communitychannel
A: "Sorry, sorry"
B: "That's very communitychannel"
A: "Another epic fail by me. I'm a born loser..."
B: "Don't be so communitychannel"