Mod!
A forum/wiki moderator, often shortened to just mod, is a person granted special powers to enforce the rules of an Internet forum/wiki. Almost all moderators on all forums can move discussions to different sections of the forum, close discussions, edit the content of individual postings, answer questions (or help people with problems), and 'stick' discussions so they remain visible in their forum section even if no new postings are made to them. Moderators on wikis can delete pages, enforce rule, etc. Different forums/wikis may give their moderators further powers, such as being able to block/ban people from the message board or wiki who are trolling or breaking the rules of the message board or wiki.
Further info:
* http://www.marketingterms.com/dictionary/moderator/
* http://www.vbulletin.com/docs/html/main/what_is_moderator
