1. A person who has renounced any normal human existence in order to spend all their time on-line.
2. A person who can only function on the internet. A person who's only place in "society" exists in said virtual world.
3. Someone totally unable to function without the aid of the internet, in that they justify their own views by locating only websites supporting these views.
4. A cyberhuman.
No one has seen Steven in at least five months. I wonder if he has turned into a briansouter? God, I hope not!