A troll may refer to any of the following:
1. When referring to a message board, a troll or e-troll is an individual who is only around to cause trouble or flame other users. When dealing with these types of users it is best to either report or ignore them. A popular phrase used online is "Don't feed the trolls," which means if you don't comment back or give them pleasure from causing grief, they'll leave.
2. When referring to computer games, a troll is a fictional creature found in many fantasy titles.