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A person who is not made of flesh and blood, but is, in fact, made of awesome.

Started by brothers John and Hank Green, as a part of the "Brotherhood 2.0" project of 2007, where John and Hank would communicate only through video blogs for an entire year. (youtube.com/vlogbrothers)

The signature move for nerdfighters is Star Trek hands (you know, the funky fingers).

Nerdfighters will be happy to know that the VlogBrothers are going on a "Tour de Nerdfighting" at some point in 2008. (papertowns.com)

Most nerdfighters desperately want to live in an imaginary (or is it) place called "Nerdfighteria" (or Nerdfightaria, depending on spelling).

(from An Abundance of Katherines, a book written by John Green)
"The fans of Brotherhood 2.0 call themselves nerdfighters. A tightknit and extraordinarily dedicated community, the nerdfighters have raised tens of thousands of dollars for charities and political campaigns, taken over the most discussed pages of youtube, and written hundreds of letters to Merriam Webster lobbying for the inclusion of the word "nerdfighter" into the dictionary."

*note: In case you couldn't tell, the term "nerd" is not used dispargingly, but is rather used as a source of pride. If one is a nerd, they should be proud!
CM: Whoa! You got a hundred on your AP World History test!
BW: Yeah, I am such a nerdfighter.
(generally used as a noun, though it can be used as an adjective : nerdfighterish)
by bootsandspooky October 28, 2008
People who instead of being made up of cells and organs and stuff are actually made out of awesome.
They fight decepticons on behalf of Nerds everywhere!
John and Hank Green are made of awesome Nerdfighters.
by SilmarilSam July 10, 2008
Nerds who fight, usually against popular people. This term originated from the videoblog Brotherhood 2.0. John Green, one of the two participants in the videoblog, noticed a game called Nerd Fighters at an airport. Eventually, the viewers of the videoblog began being dubbed nerdfighters.

Nerdfighters are considered to be "made of awesome" by John, Hank (the other participant in the videoblog), and other nerdfighters. The nerdfighters often send in pictures of nerdfighter related activities to the videoblog, such as nerdfighter embroidered pillows. It is unknown what will happen to nerdfighting when the videoblog ends.
As an adjective:
"Bob is pretty nerdfighter."

As a noun:
"Bob is a nerdfighter."

As a verb:
"Yeah, I totally nerdfought my way through that."

As a group:
"The nerdfighters killed Bob's family."
by OMOMS August 28, 2007
A nerdfighter is a person who is proud to be nerdy and intelligent, and who fights to decrease WorldSuck. Nerdfighters are not composed of cells and tissue, but instead made entirely of awesome. Nerdfighters are known to perform their Happy dances when they are joyful, and each Happy dance is unique to its respective Nerdfighter. Nerdfighters are diverse in their hobbies, which can range from writing Nerdfighter songs to playing D&D. Nerdfighters have also been described as someone who is "Outgoing, intelligent and awesome enough to accept nerd as a compliment". The polar opposite of a Nerdfighter is a Decepticon.
"I am a Nerdfighter"

"Are you a Nerdfighter? Yes? Then DFTBA!"
by penguin1124 April 10, 2009
Like regular people, only made of awesome.
Nerdfighters Unite!
by Becks Grevau September 28, 2007
Made of awesome people who are nerds. Nerdfighters call themselves nerd with a compliment, and their are many categories.
John: I've come to believe Nerdfighters is a game about nerds who fight, nerds who tackle the scourge of popular people.
by Laurenmacmoron August 30, 2007
The amazing army thought up by John Green of the vlogbrothers, after finding a video game at an airport called the same. Nerdfighters are made of awesome and kick deception ass with their jokes skillz and pwntastic Shakespeare quotes.
Dude 1: You are such a nerdfighter. You didn't forget to be awesome.
by NinatheNerdfighter February 27, 2008
A nerd who fights (against the decepticons -- also known as popular people).

One who is, instead of being made of organs and tissues and whatnot, made of awesome.

The word originated in John and Hank Green's video log projected, called vlogbrothers. While John was in an airport one day (curse those grey speckled walls), he saw a video game called Nerd Fighters.

Thus, the legacy of nerdfighting began.
Nerdfighters, we fight with our brains.
Nerdfighters, we bring the frakkin' pain.
by xxTheGazettE May 30, 2008