The definition of an internet troll:
In Internet slang, a troll (/ˈtroʊl/, /ˈtrɒl/) is a person who sows
discord on the Internet by starting arguments or upsetting people,1
by posting inflammatory,[2] extraneous, or off-topic messages in an
online community (such as a forum, chat room, or blog), either
accidentally[3][4] or with the deliberate intent of provoking readers
into an emotional response[5] or of otherwise disrupting normal
on-topic discussion.[6]This sense of the word troll and its associated verb trolling are
associated with Internet discourse, but have been used more widely.
Media attention in recent years has equated trolling with online
harassment. For example, mass media has used troll to describe "a
person who defaces Internet tribute sites with the aim of causing
grief to families."[7][8] Wikipedia
What is the equivalent for a person who does this type of thing in real life (non-cyber) troll?
Best Answer
Someone who is an instigator or trouble maker. Often the one who starts & passes on all gossip. An extreme example of someone outside of the internet who say goes "trolling" around, is someone who goes looking around for one thing or another. The phrase has been used many times to refer to older men who "troll around" or look around like they are stalking in a predatory fashion for young men or women to attempt to lure them. The term "Troll" coming from the concept that younger individuals consider the older, generally much older individuals, creepy & repulsive like a troll or ogre one would see in a fairy tale.