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

de-rezz
 /dee?rez'/

    [from ?de-resolve? via the movie Tron] (also derez)

    1. vi. To disappear or dissolve; the image that goes with it is of an
    object breaking up into raster lines and static and then dissolving.
    Occasionally used of a person who seems to have suddenly ?fuzzed out?
    mentally rather than physically. Usage: extremely silly, also rare. This
    verb was actually invented as fictional hacker jargon, and adopted in a
    spirit of irony by real hackers years after the fact.

    2. vt. The Macintosh resource decompiler. On a Macintosh, many program
    structures (including the code itself) are managed in small segments of the
    program file known as resources; Rez and DeRez are a pair of utilities for
    compiling and decompiling resource files. Thus, decompiling a resource is
    derezzing. Usage: very common.


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

de-rezz

    /dee-rez'/ (Or "derez") "de-resolve" via the film
   "Tron".  1. To disappear or dissolve; the image that goes with
   it is of an object breaking up into raster lines and static
   and then dissolving.  Occasionally used of a person who seems
   to have suddenly "fuzzed out" mentally rather than physically.
   Usage: extremely silly, also rare.  This verb was actually
   invented as *fictional* hacker jargon, and adopted in a spirit
   of irony by real hackers years after the fact.

   2. The Macintosh resource decompiler.  On a Macintosh, many
   program structures (including the code itself) are managed in
   small segments of the program file known as "resources"; "Rez"
   and "DeRez" are a pair of utilities for compiling and
   decompiling resource files.  Thus, decompiling a resource is
   "derezzing".  Usage: very common.

   [Jargon File]