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Noun. When you call someone this, your basically saying "you suck" or "you're bogus" or "you are a butt/jerk". Or "you're fuu". At times it may replace the cuss/curse word "B****" as opposed to swearing.

Invented by Jelani Mays-Smith
by BigSauceLani September 26, 2018
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When no other word comes to mind, or if u just need somthing to say. Birr is used whereever and whenever you want it to be used!!!

Invented by Sean Friel
Person1: I like cheese

Person2: (cant think of a response) Birr
by Dan Rodgers March 15, 2004
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