Short for problem exists between keyboard and chair, PEBKAC is a term used by computer technicians and IT professionals to describe a user error. The term asserts that the user is to blame when referring to the technical issue at hand; not the installed software or the device itself. PEBKAC may be considered a derogatory term as it is usually directed at computer users who have made a mistake.
Computer tech #1: "What did you determine to be the cause of that Microsoft Word issue that Jane was having?"
Computer tech #2: "It was just a PEBCAK error. Jane was selecting the wrong menu option."