资料来源 : Webster's Revised Unabridged Dictionary (1913)

Fum \Fum\, v. i.
   To play upon a fiddle. [Obs.]

         Follow me, and fum as you go.            --B. Jonson.

资料来源 : Free On-Line Dictionary of Computing

fum
     
         At {Xerox PARC}, often the third standard
        {metasyntactic variable} after {foo} and {bar}.  {baz} is more
        common outside PARC.
     
        [{Jargon File}]
     
        (2003-09-24)