"Line of Decency Crossed". Used when an unfamiliar chatter/troll/playa hater/player responds with vivid revulsion to a tongue-in-cheek comment or pWn4G3 shout. Which compels you to recognize the lack of interpersonal skills the chatter/troll/playa hater/player has. This is followed by kicking/banning/ignoring the individual from the chatroom/tourney.
player 313: pWnz0rd n00b! 455 h4nd3d 2 u!
player #2: well my father has a bigger penis than yours.
player 313: LODC
<player #2 is kicked and banned>
leetspeak for a youtube troll. Like a cancerous tumor, the ut00m3r is renowned for trolling comments, being flippant because he was beaten to the posting, or basically has nothing constructive to say. Also see YouTube hater.
#313: That vid was soooo awesome!! I'd like to see more of Dubya getting his 455 handed to him by that circus monkey. Ex-presidents mud-wrestling animals is the shet!
#troll: Your video's stupid!
#313: STFU ut00m3r!