"Do not feed the trolls" redirects here. For the Wikipedia essay, see Wikipedia:What is a troll?.

An Internet troll, or simply troll in Internet slang, is someone who posts controversial messages in an on-line community such as an on-line discussion forum with the intention of baiting other users into responding emotionally[1].[2] The rise of the expression "concern troll" reflects an expanded definition of troll as someone whose posts have the primary goal of disrupting or de-railing an internet community. "Troll" is also used in a broader pejorative sense to question the good faith of any Internet user who has annoyed the person using the term.