a sickness such as a cold, cough, fever, or random other sickness that you come down with 1 -3 days after coming into contact with musician/actor Jared Leto, drummer Shannon Leto, guitarist Tomo Milicevic, fill in bassist Tim Kelleher, former bass player Matt Wachter, or any other member of the crew for the band 30 Seconds To Mars. This illness's origin is unknown, but is rumored to be caused by germs that are transfered to you from said people, who originally got it from jet-setting across the world and coming into contact with lots of fans, groupies, skanks, media personnel, and other celebrities. It's virtually a sickness cesspool.

1: "Man, I feel sick."

2: "It could be Leto bird-flu, you did just get back from that 30 seconds to mars concert."

1: "True. I feel like puking."
by didimydoe March 6, 2008
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The Avian Bird Flu is a strand of influenza that was originally found birds and ducks across North America and Asia. It has since mutated strands and become transferable from avian to avian. Then it mutated again from Avian to human. It is not transferrable human to human at the moment, but inevitably it will mutate and wipe out half the world’s population in a manner of weeks as there is no cure and all vaccines become obsolete once the strand mutates- and it mutates constantly. It is speculated to cause a death toll greater than that of the Spanish Flu. This pandemic is widely overlooked, but it isn't a matter of 'IF' it happens. It is more a matter of 'WHEN' it happens.
When the H5N1 (Avian Bird Flu) strand of influenza becomes transferable from Human to Human it will be a manor of hours before it makes it back to North America. Exporting, Importing and Planes will allow human carriers to cross boarders and oceans and affect their families with the disease. The virus doesn't have symptoms in the first couple days, so you could be a carrier and have no idea- thus infecting your family and loved ones inadvertently.

Wash your hands.
by Dorclington April 2, 2009
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The reason why you are all alive. Chief Bird Flu is chief of the Bird Flu Society, which will shit on your face if you commit heresy. All hail Chief Bird Flu.
Chief Bird Flu owns you.
by lolcrackforever December 19, 2014
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The overwhelming weight gain in pigeons outside the Fashion Institute of Technology in NYC due to the crazy amount of dieting the fashionista students do.
I was sitting in my office and saw an obese pigeon land on the ledge. He must have a case of FIT Bird Flu bad!
by KitKat83 December 9, 2010
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an insult used by townies when challenged by anyone
person 1 "ur mum was shit"
person 2 "ur nans got bird flu"
by james burgestoff April 30, 2006
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Alanta ate salt n pepper chicken from maggie fu n it gave her bird flu !!
by BIRDFLU April 18, 2022
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