PEBKAC

from Jargon File (4.4.4, 14 Aug 2003)

PEBKAC
 /peb'kak/

   [Abbrev., "Problem Exists Between Keyboard And Chair"] Used by support
   people, particularly at call centers and help desks. Not used with the
   public. Denotes pilot error as the cause of the crash, especially
   stupid errors that even a {luser} could figure out. Very derogatory.
   Usage: "Did you ever figure out why that guy couldn't print?" "Yeah,
   he kept cancelling the operation before it could finish. PEBKAC". See
   also {ID10T}. Compare {pilot error}, {UBD}.

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

PEBCAK
PEBKAC

   <humour> (Or "PEBKAC") Tech support shorthand for "Problem
   Exists between Chair and Keyboard".

   See also {UBD}.

   (1998-08-27)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

PEBKAC
       Problem Exists Between Keyboard And Chair (telecommunication,
Usenet, IRC)