Forum Rat 

A completely forgettable message board user. Somewhere there is most likely a factory churning them out by the thousands. You'll know you're in the presence of a forum rat when you read a post and get the sudden strong feeling that you've read the exact same post before. Main characteristics of a forum rat:

-Infrequent or nonexistent use of capital letters and/or punctuation.
-Bizarre behavior and use of the English language, which is often described as either ghetto, otaku, forum female, fanboy, or even l33t d00d, or a combination of the above.
-Avatar consisting of an anime or video game character, animated sprites from Metal Slug or Final Fantasy, or the forum default Homer Simpson picture.
-Username consisting of at least five numbers or underscores.
-Huge, ugly Photoshop abortion of a signature which may stretch the page frames.
-Terrible or nonexistent lack of personality
-Completely worthless, typical, or irrelevant opinion on anything.

Most forum rats are preteen kids, and often either a fanboy, wigger, jock. Though they come and go, no board is safe from them unless the admin only lets his/her friends register.

"Where have all the interesting members run off to? This place is just clogged with forum rats now..."

Forum Rat by RealGTX March 31, 2005

Forum Rat 

Similar to a troll, a forum rat is someone who has spent so much time on an internet forum site, such as Gametrailers or Gamespot, that they start to use the usual forum-like mannerisms in real life. Whether intentional or not, this is not a good thing. It could have originated from term mallrat.

Person A: "Dude, I totally caught this 20 pound marlin out near Cabo San Lucas last weekend"

Forum Rat: "Pics or fake."

Forum Rat by Vidableek February 26, 2009

The rat form fortnit3 

The soman rat is from ortnite and says cheeesed to meet you

Im The rat form fortnit3 I’m cheesed to meat you @logishere

The rat form fortnit3 by Lucksuhbil-ity November 23, 2023