The term is being thrown around the forum at present, here are some interesting definitions from the net for all to read.

A troll is a bulletin board participant who posts for one or both of two reasons: 1) to disrupt; 2) to gain attention.



THE MAJOR BREEDS



The Vulgar Troll. These, the crudest of all trolls, make no attempt to
hide their species. Often, they make racist comments, or they may post
porn and other spam. Vulgars usually confine their comments merely to
primitive, profane, off-topic observations. When you log into the
Really Profound Serious Philosophical Discussions board and see the
post, "I smell my farts," you've spotted the Vulgar Troll. Other
species of troll sometimes revert to this form when cornered.



The Deceptive or "Classic" Troll. More sophisticated but often easily
identified and exposed, the Classic Troll gratifies his ego by
pretending to be someone or something he or she is not. Classics make
up elaborate stories about themselves, sometimes weaving some amounts
of truth into their lies. As a web of lies is difficult to build with
consistency, however, Classics are often "outed" by other forumites.
When this happens, Classic Trolls have a bag of tricks to which they
turn:



– Classic Troll Tactic Number 1: If the heat gets too much for you,
claim it was all "a joke." In this way you can excuse any and all
deceit by claiming people just weren't smart enough to "get" the humor
of it.



– Classic Troll Tactic Number 2: Create another account, and log on
pretending to be someone else, in order to show support for the Troll
in Question (TiQ). These puppet accounts sometimes claim to be
disinterested third parties. At other times they pretend to be
"friends" of the TiQ.



– Classic Troll Tactic Number 3: When your lies paint you into a
corner, claim that your little brother, or some unnamed friend, has
commandeered your account and made you look foolish. This technique can
also be applied in claiming that the puppet account(s) you created may
not, in fact, be disinterested third parties or friends, but that they
are your relatives ("little brother" is most common) only trying to
help support you.



– Classic Troll Tactic Number 4: When nothing else works, claim that
now, finally, you're telling the truth about all the lies you told
before. Make up a fresh set of lies, and throw yourself on the mercy of
the forumites.



– Classic Troll Tactic Number 5: When all else fails, claim to be
leaving forever. Trolls who claim they are leaving never do, of course;
you can bet that anyone who proclaims, "I'm never coming back here,"
will most certainly at least check back for responses, and probably
will not be able to resist posting again.



– Classic Troll Tactic Number 6: Have a tantrum. When all their other
tricks are exhausted, Classic Trolls will become angry and start
shouting. Often they revert to Vulgar Trolls when this happens.



– Classic Troll Tactic Number 7: The insincere apology. Similar to
Tactic 4, this involves pretending to repent for one's trolling and is
accompanied often by great melodrama. Insincere troll apologists
hope that they'll be forgiven if only they act disgusted enough with
their own behavior.