A slang term for AIDS.
-You mean AIDS?
by im12yearsoldandwhatisthis August 23, 2010
The disease that consumes the brains of young females, and makes them literally go insane. To be around a large group of these infected girls one mention of the name "Justin Bieber" will cause chaos and you would probably be trampled to death. These delusional tweens also believe that they will marry Justin Bieber, news flash that is not going to happen.
There is no known cure to "Bieber Fever" most likely it will be the next actress/singer to be queefed out of the murder machine that is disney.
Rabid fangirl: OmFG I <3 JuSTiN BiebR!1!!1! I'M gOinG tO MarrY HIm!!!1!!
Me: you are just an idiot with Bieber Fever, you will not marry Justin Bieber, you will most likely end up as an obese housewife with too many kids.
Rabid fangirl: *hysterical sobbing*

Rabid fangirl: Omfg Selena Gomez is dating Justin Bieber, I swear I'll kill her because she's a pedo slutbag with no life Gawd what a whore.
Me: you know it's people like you who make me look foward to dying alone.
by forever a nerd January 18, 2011
A particularly virulent strain of super AIDS discovered in the late 2000s. Etiologically speaking, it is thought to be transmitted by the vacuous, semen receptacle and proud walking advertisement for abortion that is Canada's own trainwreck, Justin Bieber. Symptoms include:

- In men, the loss of external genitalia, and displays of extreme faggotry are the first signs of the onset of this disease. This is accompanied by trying to dress like the tool (saggy pants that make it look like you just shit yourself anyone?), and using words like "Swag" like a retarded sheep.
- Hemorrhaging of the ears
- Explosive diarrhea
- Projectile vomiting
- Crysturbating in a dark room to Justin Bieber posters and blowup dolls that you shamelessly hide from your parents
- Atrophy of higher cortical structures in the brain. Global signs of dementia and profound mental regression are extremely common in later stages. Critical-thinking faculties are the first thing to go, followed by grammatical processing, spelling, and response inhibition. The loss of response inhibition manifests as Tourette's-like outbursts against anyone who has enough brains to dislike the turd, usually to this other person's amusement. Eventually, the patient's cognitive faculties are all but lost, rendering them zombies.

Other symptoms include everyone who hasn't caught it finding you insufferably obnoxious and wanting nothing to do with you anymore.
There is no known cure for Bieber Fever that results in the patient surviving. The only known way to cure Bieber Fever completely is with a bullet to the head.
by Dr. Snark, PhD December 01, 2013
a disease that is caused by listening and progressively becoming obsessed to Justin Bieber and his music. 1 in 4 children worldwide die from this every 15 seconds. if you or anyone you know start getting symptoms (starting to think justin's music is good and think the lyrics are smart) contact the nearest doctor immedeatly.

by departmentofmysteries September 10, 2011
An obsession with Justin Bieber so extreme that it's to the point where you are rioting at his concerts and trolling classic rock videos on YouTube. You probably still have bruises from the rubber bullets.
Example 1
Riot Cop 1: Are the fire hoses in place just in case?
Riot Cop 2: Yes sir, the Bieber fever always gets out of hand.
Riot Cop 1: Good. I hate these damn concerts.

Example 2
JustnBeberFan4EVER: aerosmth sux cuz they old they gonna die out!!! justn beiber is gona liv on 4 ever!!!!! yayy!!!
Delta07: Please, go to Google and type in "define: literacy".
by Kurt051 February 16, 2011
Bieber Fever is a really contagious and dangerous disease found most commonly in girls aged 8-14 and some gay guys. Most people develop immunisation at first contact.

Bieber Fever is caused by listening to Justin Bieber's music. Until he is terminated, Bieber Fever will continue spreading around the world.

Bieber Fever can cause sever brain damage- They believe Justin Bieber is a boy even though SHE is obviously a girl. They also call themselves "Beliebers" even though it has been scientifically proven that beliebing is impossible. There have even been cases of heart attack at the sight of Justin Bieber.

This disease can range from mild to deadly. Unfortunately, the only cure available so far is to smash all CDs, burn all posters and stop all access to Disney channel and YouTube. Experts around the world are currently researching how to end this madness. (Madness? This is Sparta!)
If you have a friend, family member or loved one who has been inflicted with Bieber Fever, please kindly punch or slap them in the face and tell them to move to another planet.
by Teh_Pseudonym January 19, 2011
A deadly disease that has ruined the world and caused many teenage girls to enjoy the horrible singing of Justin Bieber and his wanna be skater look. Those that suffer from this disease must be removed from the gene pool so that the rest of the world does not become infected.
Why do teenage girls have Bieber Fever? They are in love with a gay teen that hates the United States and will never hit puberty.
by The Sackman February 21, 2011

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