go flatline

go flatline v.  [from cyberpunk SF, refers to flattening of
   EEG traces upon brain-death] (also adjectival `flatlined'). 1. To
   {die}, terminate, or fail, esp. irreversibly.  In hacker
   parlance, this is used of machines only, human death being
   considered somewhat too serious a matter to employ jargon-jokes
   about.  2. To go completely quiescent; said of machines undergoing
   controlled shutdown.  "You can suffer file damage if you shut down
   UNIX but power off before the system has gone flatline."  3. Of a
   video tube, to fail by losing vertical scan, so all one sees is a
   bright horizontal line bisecting the screen.