The Collaborative International Dictionary of English v.0.48:

Slipknot \Slip"knot`\, n.
   knot which slips along the rope or line around which it is
   made.
   [1913 Webster]

WordNet (r) 3.0 (2006):

slipknot
    n 1: a knot at the end of a cord or rope that can slip along the
         cord or rope around which it is made

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

SlipKnot

    A graphical web browser specifically
   designed for Microsoft Windows users who have Unix shell
   accounts with their service providers.  Its primary feature
   is that it does not require SLIP or PPP or TCP/IP
   services.  SlipKnot is distributed as restricted shareware.

   Version: 1.0.

   SlipKnot home (http://micromind.com/slipknot.htm).

   E-mail: .

   (2003-03-25)