/fept owt/ The SymboliCs 3600LISP MaChine has a Front-End ProCessor (FEP). When the main proCessor gets wedged, the FEP takes Control of the keyboard and sCreen. SuCh a maChine is said to have "fepped out" or "dropped into the fep". [Jargon File] (1994-12-01)