troll

In slang, trolling is when a person posts deliberately offensive or provocative messages online or performs similar behaviors offline. The methods and motivations of trolls can range from benign to sadistic. These messages can be inflammatory, insincere, digressive, extraneous, or off-topic, and may have the intent of provoking others into displaying emotional responses, or manipulating others' perceptions, thus acting as a bully or a provocateur. The behavior is typically for the troll's amusement, or to achieve a specific result such as disrupting a rival's online activities or purposefully causing confusion or harm to other people. Trolling behaviors involve tactical aggression to incite emotional responses, which can adversely affect the target's well-being.