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

sneakernet
foot-net

   /snee'ker-net/ Term used (generally with ironic intent) for
   transfer of electronic information by physically carrying
   tape, disks, or other media from one machine to another.

   "Never underestimate the bandwidth of a station wagon filled
   with magtape, or a 747 filled with CD-ROMs."

   Also called tennis-net, armpit-net, floppy-net, shoe-net,
   walk-net, foot-net.

   (2003-07-02)


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

sneakernet
 /snee'ker·net/, n.

    Term used (generally with ironic intent) for transfer of electronic
    information by physically carrying tape, disks, or some other media from
    one machine to another. “Never underestimate the bandwidth of a station
    wagon filled with magtape, or a 747 filled with CD-ROMs.” Also called
    ‘Tennis-Net’, ‘Armpit-Net’, ‘Floppy-Net’ or ‘Shoenet’; in the 1990s, ‘Nike
    network’ after a well-known sneaker brand.