FREDder
From FreeSpace Wiki
FREDder (or sometimes FREDer) is a term in the jargon of the FreeSpace community. A FREDder is any fan who uses FRED (or FRED2) to make home-made missions for the FreeSpace universe.
The act of using the mission editor is called FREDding. A verb to FRED is also used by the FreeSpace community. To FRED means to make a mission using FRED.