The term Bieber fever applies mainly to prepubescent girls with a few exceptions. Most people that actually have bieber fever are either:
1. Deaf
2. Possesing an IQ below room temperature
3. Pedophiles
4. Knowing nothing about music
5. Under the age of 10

Few people know the cause of Bieber Fever, but it generally causes any girl years younger than him to love him and anyone with a tiny bit of manliness or sense of music having a strong hatred towards the girl they call Justin. Usually this would cause someone to go to jail and eventually get shanked multiple times, but Bieber is a celebrity and is known to attract miles of fools that can actually listen to his sqeaky xbox live-esque voice. After concerts, the crowds are generally worse than riots, and the Local Swat teams have to hold back the now savage fans.
Dumbass Girl: Woo! I have Bieber Fever!

Person with complexity above a fruit fly: He makes horrible music, how can you like him?

Dumbass Girl: STFU! He's very talented

Person: *Sigh* (Procedes to daydream about Bieber getting cudgelled)
by Jag140 July 9, 2011
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A pandemic sickness that infects the weak and unprepared who are easily satisfied by seven-year-olds singing. The probability of infection depends on the carrier and the exposure victims. It feeds on people's minds and souls, and its path of destruction is powered by attention, whether it be good or bad.
Symptoms include sudden interest in a certain brownish-haired seven-year-old looking boy and other people often commenting on how stupid you are. You may also want to check for posters in your room featuring the aforementioned child. It is best if you do not contract this disease, or else you will not have the sanity to treat it, and no one else can help you. If you have a friend who is infected by this, we're sorry.
Methods of prevention of Bieber Fever can include listening to real music, instead of a small child attempting to sing. To prevent this disease from spreading too far, mentioning of the child known as Justin Bieber should be kept to a minimum so as to keep people from giving him attention.
Person A: Omgomg, I have Bieber Fever, omg, Justin is soooo hot!
Person B: Omg me too! What about you, C?
Person C: ......NO.
by LALALALA...lol? February 14, 2011
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the long way of saying your fucking gay :D
Mike: Dude, ryan has bieber fever

You:what a faggot
by Mike Hawk2232 September 6, 2010
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Noun- The morbid obsession with Justin Bieber. Sometimes asociated with masturbatal deaths and Kim Kardashian's enormous horse penuscis(aprox. 24' long).
My doctor said I had one of the most advanced cases of Bieber Fever since Nam.
by Pedophiles United May 10, 2010
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Recipe for Bieber Fever
1. Get a 10 of teenage boys to cum onto a kitten
2. Have someone's mother fart on it
3. You then shave the kitten's back
4. Have each of the teenagers shove trimmings into their anus for a week

5. Remove the trimmings and place into a bowl
6. A random person is picked (by rolling a dice or picking sticks), who then has to cut off his foreskin and then eat everything
Someone: How come you were at the hospital last week?
You: Came down with Bieber Fever.
Someone: Nasty...
by JBiebszer November 12, 2011
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Being extremely over-obsessed 16 year old who hasn't hit puberty yet, to the point where you have posters, notebooks, shirts and other things with his face on it. You need to realize that he has no talent, you just think he's 'hot'.
Uhhh everything you own has that Beaver kid on it.

I hate to say this, but I think you have Bieber Fever xP
by saddlseatlover March 6, 2011
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