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

bletcherous
 /blech'@?r@s/, adj.

    Disgusting in design or function; esthetically unappealing. This word is
    seldom used of people. ?This keyboard is bletcherous!? (Perhaps the keys
    don't work very well, or are misplaced.) See losing, cretinous, 
    bagbiting, bogus, and random. The term bletcherous applies to the
    esthetics of the thing so described; similarly for cretinous. By
    contrast, something that is losing or bagbiting may be failing to meet
    objective criteria. See also bogus and random, which have richer and
    wider shades of meaning than any of the above.


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

bletcherous

   /blech'*-r*s/ Disgusting in design or function; aesthetically
   unappealing.  This word is seldom used of people.  "This
   keyboard is bletcherous!" (Perhaps the keys don't work very
   well, or are misplaced.)  The term bletcherous applies to
   the esthetics of the thing so described; similarly for
   cretinous.  By contrast, something that is "losing" or
   "bagbiting" may be failing to meet objective criteria.

   [Jargon File]