The Free On-line Dictionary of Computing (19 January 2023):

garply

   /gar'plee/ A metasyntactic variable like foo, once popular
   among SAIL hackers.

   [Jargon File]

   (1994-11-03)


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

garply
 /gar'plee/, n.

    [Stanford] Another metasyntactic variable (see foo); once popular among
    SAIL hackers.