Anyone online that mainly curses others out for their intrests, looks, human rights, or basically anything that doesn't harm the public online. They usually do this since they know they'll get their asses pummeled in real life if they tried to pull the same shit off. They overpopulate the online communication world and so more and more people join the bandwagon to gain popularity online due to desperite need for attention. Could mean anyone who is rude or obnoxiouse to anyone online without being provoked; with fairly poor insults that only other cyber-bullies seem to actually think is funny or makes any sense.
When two meet, they either curse each other out in a stupid arguement or team up and find others to torment.
Person 1: Do you enjoy Anime?
Cyber Bully: OMG, You fucking Jacking-Off Dildo.
Person 1:I was just asking...
Person 2: Dude, go screw around with others in real life except the internet, we all know you'll just get your ass-handed to you anyways.