PEBKAC: Meaning (information, definition, explanation, facts)

PEBKAC is the acronym for "Problem Exists Between Keyboard and Chair". Used by tech support to refer to troublesome users, identifying them as the source of the problem.

An example would be the oft-used tech support horror story describing a frazzled woman who calls complaining her coffee-holder is broken - which is actually the CD-ROM drive tray.