twilight zone

from WordNet (r) 3.0 (2006)

twilight zone
    n 1: the lowest level of the ocean to which light can reach
    2: the ambiguous region between two categories or states or
       conditions (usually containing some features of both); "but
       there is still a twilight zone, the tantalizing occurrences
       that are probably noise but might possibly be a signal"; "in
       the twilight zone between humor and vulgarity"; "in that no
       man's land between negotiation and aggression" [syn:
       {twilight zone}, {no man's land}]

from Jargon File (4.4.4, 14 Aug 2003)

twilight zone
 n., //

   [IRC] Notionally, the area of cyberspace where {IRC} operators live.
   An {op} is said to have a "connection to the twilight zone".

from The Free On-line Dictionary of Computing (8 July 2008)

twilight zone

   [IRC]  Notionally, the area of cyberspace where {IRC}
   operators live.  An {op} is said to have a "connection to the
   twilight zone".

   [{Jargon File}]