Abbreviation of the phrase "Bitching in Range." To talk negatively of a certain person/persons, when said party may be present within a distance capable of hearing such accusations. This often leads to an awkward silence, and a brief wave of severe guilt.
Adopted by a clan called 'The Cider-Riders' , the phrase has spread to mainstream use by the students of KEGs, which is a college in a town somewhere near Coventry.

'Remember to always check for BIR prior to bitching.'
Cider-Rider-1: "That Gemma is a right slag, and she's ugly"

Cider-Rider-2: "Shit check for B.I.R!"

*looks behind and all around*

Cider-Rider-1:*whispers* "oooooohmygod shes sitting behind us....."
by Davey2009 April 27, 2009
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"I'm think love is coming to me"
"Power is a necessity , money is what you need, why love to bother, when the price not worth a penny"
"B.I.R"
by jamesbrian December 2, 2021
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Short for Bad Internet Rappers. Essentially someone who consistently posts covers of popular rap songs and uses an old Xbox mic to record them. They are mostly white and think they are black and claim they are the new style of rap and are the underground.
P1: Have you seen Zach?
P:2 Yeah, hes such a B.I.R.!
by Justice Won November 16, 2014
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