Op
1. Short for operator, op is also known as Chanop, which is short for channel operator; or IRCop, which is short for IRC operator. An operator is a super user in an IRC channel that has the ability to control and moderate a channel. For example, if a user enters the IRC channel and harasses other users, the op has the ability to kick that user from the channel. There are commonly two types of OP's in each IRC channel a SOP and HOP.
Tip: This term should not be confused with a computer programming operator, see the operator definition for further information about this term.
2. Abbreviation for opinion that is used in chat and other text-based communications.
3. When talking about a user on a forum, op is short for original poster and is the first person started a topic on a forum.
Also see: AOP, Chat definitions, IRC, Forum, Operator, Root, Sysop, WALLOPS