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

hing
 //, n.

    [IRC] Fortuitous typo for ?hint?, now in wide intentional use among players
    of initgame. Compare newsfroup, filk.


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

hing

   (IRC) Fortuitous typo for "hint", now in wide intentional
   use among players of initgame.

   Compare newsfroup, filk.

   [Jargon File]

   (1994-12-07)