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(Girl Is Blowing Me) Usually used for when you buddies call or you call your buddies in the middle of the act to either gloat or show that they should call back later.
Frank: Hello
Dave: Sup man we're about to hit up a bar you wanna-
Frank: Not today GIBM but you can check later.
Dave: Nice...
by UnknwnSecret April 06, 2011
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