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

super source quench
 n.

    A special packet designed to shut up an Internet host. The Internet
    Protocol (IP) has a control message called Source Quench that asks a host
    to transmit more slowly on a particular connection to avoid congestion. It
    also has a Redirect control message intended to instruct a host to send
    certain packets to a different local router. A ?super source quench? is
    actually a redirect control packet, forged to look like it came from a
    local router, that instructs a host to send all packets to its own local
    loopback address. This will effectively tie many Internet hosts up in
    knots. Compare Godzillagram, breath-of-life packet.


The Free On-line Dictionary of Computing (30 December 2018):

super source quench

   A special packet designed to shut up an Internet host.  The
   Internet Protocol (IP) has a control message called Source
   Quench that asks a host to transmit more slowly on a
   particular connection to avoid congestion.  It also has a
   Redirect control message intended to instruct a host to send
   certain packets to a different local router.  A "super source
   quench" is actually a redirect control packet, forged to look
   like it came from a local router, that instructs a host to
   send all packets to its own local loopback address.  This will
   effectively tie many Internet hosts up in knots.  Compare
   godzillagram, breath-of-life packet.

   [Jargon File]