board rage

Board Rage:

Anger outburst on a message board.
Usually displayed by incoherent, misspelled aggressive thoughts typed with "Caps Lock" on.

Excessive aggression due to the misunderstanding of another post. Most likely caused by the rager's inability to:
a- get a joke.
b- understand sarcasm.

Facilitated by the fact that most people in cyberspace have much bigger muscles than in real life.