"Dixie Flatline"

*(HER): Who (or what) is Dixie Flatline? Is it a nickname or just an odd, futuristic name that’s common in Gibson’s reality? Is the imagery of “flatline” important – the idea of a heart stopping? Gibson tends to do this to us – to throw out a name or a place and offer no further explanation.
**(CUL): Is Dixie Flatline a household name? Molly asks this question assuming Case knows who the person is. The reader is left in the dark, witnessing a conversation about an apparently dead mutual acquaintance of Molly and Case.