Other spellings include retro-encabulator or retro-incabulator.

Doing a little more research dug up the term turbo-encabulator which has to be the source of the Rockwell video take off.  Seems there was one done at Ford Motor Company as well.  Eric Smith has a copy of a General Electric Turboencabulator data sheet from the 1960s.  Apparently this spoof goes way way back.