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

marketroid
 /mar'k@?troyd/, n.

    alt.: marketing slime, marketeer, mar?ket?ing droid, marketdroid. A member
    of a company's marketing department, esp. one who promises users that the
    next version of a product will have features that are not actually
    scheduled for inclusion, are extremely difficult to implement, and/or are
    in violation of the laws of physics; and/or one who describes existing
    features (and misfeatures) in ebullient, buzzword-laden adspeak.
    Derogatory. Compare droid.


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

marketroid

   /mar'k*-troyd/ (Or "marketing slime", "marketeer", "marketing
   droid", "marketdroid") A member of a company's marketing
   department, especially one who promises users that the next
   version of a product will have features that are not actually
   scheduled for inclusion, are extremely difficult to implement,
   and/or are in violation of the laws of physics; and/or one who
   describes existing features (and misfeatures) in ebullient,
   buzzword-laden adspeak.  Derogatory.

   [Jargon File]

   (1995-02-23)