The Urban Dictionary has a bunch of definitions under the term “trolling,” but the first one that pops up seems to define it as simply as possible. So, according to the Urban Dictionary’s top rated definition for “trolling,” it can be defined as:
“Being a prick on the internet because you can. Typically unleashing one or more cynical or sarcastic remarks on an innocent by-stander, because it's the internet and, hey, you can.”
Wikipedia defines it as:
"Someone who posts inflammatory, extraneous, or off-topic messages in an online community, such as a forum, chat room, or blog, with the primary intent of provoking readers into an emotional response or of otherwise disrupting normal on-topic discussion.”
Those who aren’t quite familiar with the Internet Slang definition of “troll” or “trolling” might automatically think of the mythical creature from Scandinavian folklore. The mythological troll is known to be an ugly, dirty, angry creature that lives in dark places, like caves or underneath bridges, waiting to snatch up anything that passed by for a quick meal.
In some ways, the mythological troll is similar to the internet troll. The internet troll hides behind his computer screen, and actively goes out of his way to cause trouble on the Internet. Like the mythological troll, the internet troll is angry and disruptive in every possible – often for no real reason at all. (from Lifewire.com)
Just as bad as trolling is "Feeding the Trolls". This is when people say stuff that they know will prompt someone to respond with a trolled reply and/or replying to comments that are blatantly from a troll. This is especially true when a troll first makes his comment/reply, and (usually many) people respond, either trying to correct the troll, or express anger at the statement. At that point, the trolling was successful and has been fed. When encouraged by success and feeding, trolls often return.
Now that you have the definition of a Troll, I must make it quite clear that we don’t allow them in this forum. Trolls should go and check out “Glacinda the Troll’s Bridge Club”, which would be a much more suitable place for them to hang out – Bazinga!