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

wirewater
 n.

    Syn. programming fluid. This melds the mainstream slang adjective ?wired?
    (stimulated, up, hyperactive) with ?firewater?; however, it refers to
    caffeinacious rather than alcoholic beverages.


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

wirewater

    programming fluid.  This melds the mainstream slang
   adjective "wired" (stimulated, up, hyperactive) with
   "firewater"; however, it refers to caffeinacious rather than
   alcoholic beverages.

   [Jargon File]

   (1995-02-27)