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Someone who uses a macintosh and thinks they're the greatest things ever. Usually doesn't know a damn thing about computers.
That mac-jack has every piece of mac compatible software and it can't even fill his harddrive.
by JiaXue November 24, 2003
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Stealing a macbook from someone when they are not paying attention
Jimmy got mac jacked when he wasn't paying attention in class
by LostKeys666 September 16, 2009
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