The Jargon File (version 4.4.7, 29 Dec 2003):

Fred Foobar
 n.

    J. Random Hacker's cousin. Any typical human being, more or less
    synonymous with ?someone? except that Fred Foobar can be backreferenced
    by name later on. ?So Fred Foobar will enter his phone number into the
    database, and it'll be archived with the others. Months later, when Fred
    searches...? See also Bloggs Family and Dr. Fred Mbogo