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Also known as a dorm rat. A student that for whatever reason, wants no part of the greek system. They oftentimes sit alone in their dorms on weekends wondering whats going on in the outside world. They have a distinct unfounded hostility toward Greeks, but never hesitate to leach off of them, such as drinking their beer, or attending parties, from which they always end up going home alone. Many of them get all of their information on Greek life from TV and movies, they never bother to do any actual research. According to them, Greeks are "losers who have to pay for their friends." It never occured to them that one of their favorite celebrities is very likely a greek. It never occured to them that a "frat boy" could someday turn out to be, say, some of the greatest athletes/coaches of all time(Michael Jordan, Shaq, Karl Malone, Wilt Chamberlain, Orel Hershiser, Terry Bradshaw, John Elway, Jerry Rice, Emmit Smith, Jackie Robinson, Hank Aaron, Pat Riley, Phil Jackson, Larry Brown, Mike Ditka, Tiger Woods, Jesse Owen, Troy Aikman, Lou Gehrig, just to name a few), some of the most famous actors/entertainers(Elvis Presley, Johnny Carson, David Letterman, James Caan, Burt Reynolds, Bob Hope, Brad Pitt, Matt Groening, Steven Spielberg, Warren Beaty, Tom Selleck, Ron Jeremy, Paul Newman, Merv Griffin, Danny Thomas, James Dean, Harrison Ford, John Wayne, just to name a few), (Martin Luther King Jr., Rev. Jesse Jackon, Nelson Mandela, 85% of US Supreme Court Justices, 76% of the Nations senators, all but two US presidents since 1825), a famous astronaut(everybody on the Apollo 11 crew), a famous business owner(43 of the 50 largest corporations in the nation are headed by "frat boys"), or even their mommy and daddy's boss. According to studies, only about half of GDI's end up graduating college, as opposed to 71% of Greeks.
That kid went GDI after getting blackballed by 2 fraternities.
by TKE468 January 02, 2006
Shorthand version of the Global Defense Initiative, one of two factions in the Command & Conquer series of games.(Generally regarded as "the good guys".)
The GDI has Mammoth Tanks, while Nod has Stealth Tanks.
by Joseph D. Collins May 01, 2005
A person that cares more about quality than quantity. Someone that knows there has maybe been one or two "cool" people that have actually stayed in fraternities and graduated, and that the "lists" fraternities and sororities come up with are just composed of people that wised up and eventually dropped out. Elvis was an honorary member of a frat for a day, and Willie Nelson never graduated nor did Drew Carey. The title "God damn independent" is a badge cool people would wear with pride you fucking idiots.

People that never decided to become a frat faggot:

1. Jimi Hendrix
2. Bob Dylan
3. Anyone legend in the history of rock and fucking roll

The label is given by the most insecure of scum, not realizing that the actual cool people are touring the nation and getting laid by dime pieces every night.
Frat Faggot: "We'll never tour the nation in a band, be well respected artists, or have an ounce of credibility to anyone besides our butthole brothers!"

Sorority Sister: "Yeah! Jimi Hendrix was so unpopular and uncool! What a fucking piece of shit!"

Frat Faggot: "Yeah, and the entire rock and roll hall of fame list is full of those god damn independents too! When will they ever be as cool as us????"

Sorority Sister: "..."

Frat Faggot: "..."

Sorority Sister: "I'm gonna go book a band composed of people that spent their lives shunning people like us. They will get paid fat and have free drinks knowing we are pieces of shit. I may also black out and get fucked by all of them."

Frat Faggot: "Is it too late to be a GDI?"
by Realllittttyyy February 01, 2011
The definition of GDI is not completely known by greeks mainly because they havent seen them in about three and a half years. Nobody knows what they could possibly be doing with their lives because the greeks are too busy being fucking awesome and living their fucking awesome lives. Greeks dont even notice people who dont wear letters. Gdi's are invisible for all intents and purposes and are not worth the time of day. Good luck in life gdi's...sorry your not in the elite group of humans.
Some people pretend to have fun in college (gdi's) and others actually do(greeks).
by flo rida925 February 27, 2011

Stands for God Damn Independent
Deriving from the latin word "gidiom" meaning stupid lame asshole who can't get girls and isn't allowed in any parties.

Definition: A non-impressive, ordinary person with no sense of style or social skills who was not fortunate enough to recieve a bid from a fraternity because they were not good enough. Instead of contributing to the college community, G.D.I.'s drive around in lifted trucks wearing affliction shirts and sweatpant shorts hating their lives and despising themselves for not being a better person and taking part in Greek Life.
"Fraternities are for gay guys man! I want to rage in my dorm and play World of Warcraft with my friends because im a gdi!"

"Dude people that don't live in frat houses still get girls bro! Trust me I get girls every night!"
by betaluvr November 08, 2011
"Greek Deprived Individual". One who has decided that he would rather play video games in his dorm room than to join a fraternity of men. Despite his ignorance of what goes on in a fraternity he still chooses to stereotype and label anyone who has made the honorable choice to join the ranks of a Greek organization. Usually justifies his choice by slandering fraternities claiming they groups of superficial, dumb, alcoholics because he either knows he is too socially awkward to join a fraternity or he did not receive a bid to a fraternity. Fortunately a GDI usually remains unsuccessful in life and his ignorance has no influence on upper society. Can usually be characterized by cargo shorts, lack of friends, and lack of money currently and into his adulthood.
Contrary to popular belief, GDI's usually have lower grade point averages than their Greek counterparts and usually go on to be much less successful.
by Frat hard frat often December 11, 2010
A GDI is pretty much everyone who wrote a whiney bitch definition of fraternity.
GDI: Since I didnt get a bid from a fraternity because im fucking lame, I'll go be a bitch about it on urban dictionary.
by Sigma Nu Until I Die November 07, 2010
GDI-(God Damn Independent) is a person who chooses either to not affiliate themselves with Greek life, can't afford Greek life, can't get a bid, or was too much of a weakling to finish pledgeship. GDIs are usually of lower class and even lower standards, also GDIs despise Greeks out of jealousy.
GDIs are nasty animals colleges use pay for theirselves.
by Mr. Todd Finnigan Maxwell November 29, 2010