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1.
A sound that one says when one is overly excited or pumped up. A term of agreement (common among pirates). A combination of the words yar and byah(from The Chappelle Show).
Chris: Yo did you see Kobe drop 40 on the Suns last night?

Graham: Byar.


Hannah: Chris do you wanna hang out tonight?

Chris: Are you going to show me your titties?

Hannah: Byar.


Chris: BYAR! Man I am so pumped we won that game.

Bob: Byar man me too!
by TheNation02 January 07, 2009