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

cruft together
 vt.

    (also cruft up) To throw together something ugly but temporarily workable.
    Like vt. kluge up, but more pejorative. ?There isn't any program now to
    reverse all the lines of a file, but I can probably cruft one together in
    about 10 minutes.? See hack together, hack up, kluge up, crufty.


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

cruft together

    To hack together though with the suggestion that
   the result may be cruft.

   [Jargon File]

   (2006-01-19)