"Cyberbullying involves the use of information and communication
technologies such as e-mail, cell phone and pager text messages, instant messaging, defamatory personal Web sites, and defamatory online personal polling Web sites, to support deliberate, repeated, and hostile behaviour by an individual or group,
that is intended to harm others."

A phrase to describe the use of such entities as myspace, youtube, or any form of chat/free online discussion for the purpose of trash-talking one's peers. Used often by ill-informed middle aged "experts" such as teachers, soccer moms, liberal politicians, social workers, and school administrators who seek to demonize and censor myspace or any other free web usage.
Cyberbullying is often played up as a major threat to youth, although only a very small percent of young internet users are actually offended by others' trash talk and take it to heart enough to actually consider it bullying. And, as so often happens, a few ruin it for the rest of us.

A term for bullying across the internet via IM, E-Mail, Facebook or other social network.

-verb.

1. Posting the names of people you hate with derogatory definitions on Urban Dictionary in hopes that the editors miss it. An UD cyberbullie is a true, nutless coward for anonymously posting things to avoid getting their ass kicked properly.

They also typically can't spell or use punctuation properly because, well, you have to be young and half retarded to think this is cool in the first place.