Also see y00bish and y00b. Someone that is y00ber gets joy from seeing their own spam messages, having people getting mad at them for teamkilling, or anything else that people hate and yet they still do. If you come across a y00ber y00b, you better run for your life.
Crap! That y00ber idiot just had to drop a grenade when our WHOLE SQUAD was in the elevator, didn't he?