forumite 

A regular at any given Internet message-board system, or "forum".

The forumites of the GameSpy Forums are often plagued by the whining of n00bs.

forumite by Macavity October 30, 2003

forumate 

(Computer Science) to spend copious quantities of time religiously reading and replying to posts on online bulletin boards (forums).

Nick forumated for most of the night.

forumate by SwingKing March 31, 2003

forumize 

The act of foruming, whether it be posting in a forum, reading through a forum, or anything else involving a forum.

Dude, let's go forumize on smogon.

forumize by Batpig July 21, 2005

forumitis 

The swelling of one's ego as a result of constantly disparaging those who ask reasonable questions on forums, often with the assumption others will join in. A result of daddy issues, low self-esteem, having nobody in the real world care for them, and wanting to prove that they know some obscure thing.

"Man, I asked how to do an extremely complex process that isn't explained anywhere else on a forum meant to help people like me, and everybody insulted me!"

"Oh, don't worry, those guys just have forumitis."

forumitis by BeeTeeDubya August 10, 2015