Harassment is a form of cyber bullying that involves sending offensive or mean comments to someone in order to make them feel bad about themselves. Harassment is often something that is continuing and ongoing.
Flaming is a lot like harassment, except for the fact that harassment is usually private and between two people. Flaming is a lot more public and occurs in group chats or message boards.
Exclusion is when a single person is singled out in a group chat or public chat. That singled out person is usually then made fun of by the others who singled he or she out.
Outing is when a bully posts another persons private information online, without their consent, for the public to see.
Masquerading is when a bully creates a fake account in order to harass someone anonymously. The bully can also pretend to be someone else in order to ruin the victims reputation.