Someone who is purposefully posting on a forum/messageboard/site sith the sole aim to irritate the regular members.

Contrary to popular belief there is much more to internet trolling than posting "OMG UR ALL SO GHEYYYY!!!1" "OMFG TRIVIUM SUX ASS U FAGS LOL" and the like. People who post such things will usually be one-post wonders and get banned, however the more experienced troll will attempt to cause some sort of havoc under the admins radar.

Common examples of trolling:
The long-term troll:
These guys don't mind waiting around for the fun to begin. They may pretend to be an average n00b, and give themselves the stereotyical interest(s) of the average member of said forum, then once having a few posts they will gradually try to spread dissent. This type may even pretend to be pally to the admin and get their msn (and try to crack their account password of course) whilst causing general disruption. May act under other proxies and slate these fake trolls on msn to the aforementioned gullible admin. These people, to be frank, usually have no life and love bringing message boards to their knees by putting considerable time into their carnage. If they crack the admins password the board is doomed.

The sophisticated troll:
This type will usually have some sort of distaste for whatever the said message board is discussing and try to cause annoyance as opposed to destructiveness. They will parody the members and see how much they can get over their heads. Subtle pisstaking being their route. They'll usually get banned in the end but will annoy an entire community using this drawn out approach.

The faker troll:
A clever troll, the main aim of the game is to, ironically, act really REALLY stupid, this trolls aim is to argue with members incoherantly, usually using text speak. This is a ploy, the troll only needs to spend 10 seconds writing the babble when the member wastes 10 minutes writing a much more wordy reply. The troll will reply with a stupid rebuff making the member post as many long replies as possible. Using the members weight against them and wasting their forum time... If they are good then their act will be believable and they probably won't get banned unless the admin is strict on txt tlk.

The rank and file spammer:
These are the first to pop into peoples minds, they are similar to the examples stated in the first paragraph. No previous experience necessary, this lot will swarm in, again, usually under proxies to maximise the destructiveness, and spam the place to hell. Only causes mild irritation if not in large numbers.

Join any popular forum for a year and I guarantee you'll see all of these.
(let's assume it's a metal board)

Faker troll (expecting to cause irritation):
"Hi im nu here u all seem kl i am rly metal rawrrr i leik slipnot and fall out boys!!!1 they r so metal! see u al on da forum xxx"

Rank and File spammer:

by PsychoFox February 12, 2008
a short man in his early 20s; most likely a partier and/or druggie; most likely a little weird-looking
I saw a troll at a party last night and almost ran him over; they should wear heels.
by TFB14 January 27, 2015
(n.) Someone who is either a horrible person, or who PRETENDS to be a horrible person 'for lulz', because they are a horrible person.
"I'm not sure, but these messages beseeching me to " literly kill yrslf IRL" from someone named "I_fisted_yr_Nana" MIGHT be the work of a troll.
by K4S3-UD January 02, 2015
Being mean to someone online. sometimes its funny but usually its just a jelly-ass 12 year old on ps network for funny trolling see "true capitalist radio" for un-funny trolling see any other video
im getting trolled by this jellyass
by agent chaos September 23, 2012
Someone who deliberately causes an argument online.
Man that troll spammed up my whole profile!
by heujtfaiew4o January 09, 2012
The thing on the world of warcraft ads on this page.
The troll holds the "play free now" sign.
by jkjhkjhkjhk December 08, 2011
Trolls are a subculture of men and women typically in their 20's and 30's that value independent thinking, counter-culture, progressive politics, an appreciation of art and indie-rock, creativity, intelligence, and witty banter. The greatest concentrations of trolls can be found living in the Williamsburg, Wicker Park, and Mission District neighborhoods of major cosmopolitan centers such as New York, Chicago, and San Francisco respectively. Although "trollerism" is really a state of mind,it is also often intertwined with distinct fashion sensibilities. Trolls reject the culturally-ignorant attitudes of mainstream consumers, and are often be seen wearing vintage and thrift store inspired fashions, tight-fitting jeans, old-school sneakers, and sometimes thick rimmed glasses. Both troll men and women sport similar androgynous hair styles that include combinations of messy shag cuts and asymmetric side-swept bangs. Such styles are often associated with the work of creative stylists at urban salons, and are usually too "edgy" for the culturally-sheltered mainstream consumer. The "effortless cool" urban bohemian look of a troll is exemplified in Urban Outfitters and American Apparel ads which cater towards the troll demographic. Despite misconceptions based on their aesthetic tastes, trolls tend to be well educated and often have liberal arts degrees, or degrees in maths and sciences, which also require certain creative analytical thinking abilities. Cons...
Those trolls are always on their bikes.
Why do trolls dress nicely?
by rocketshark November 29, 2011
When your parents (mostly moms) say you cant go somewhere and the only reason is because they said so
Son: mom can i go hang out with my friends tonight
Mom: no
Son:why not?
Mom: because i said so
Son: mom your such a troll
by Stackhouse159 October 22, 2011

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