A term to describe an act of intensionally enraging a group of people on an internet chat room or forum board. It's often used as a parody of Die Hard an action film from 1988, although instead of the protagonist climbing a tower full of armed terrorists he is climbing a tower of shit puns and all caps all in bold italics and font size 26, all while spouting memes and ridiculous opinions on a plethora of things.
Trolling hard on the Dues Ex fan forum:
User: Lol Halo invented the FPS, Dues ex looks like shit, and is old.
Troll hard on the Bungie forum:
User: Halo is shit lol MW2 is teh best fps evar, nd joo all know it.
a bearded dwarf with a hard-on
H: Look that trolls got a troll hard
A: What a freak he must have looked at your boobs
H: LOLOLOL (COLCOLCOL)