The Collaborative International Dictionary of English v.0.48:

Tallowy \Tal"low*y\, a.
   Of the nature of tallow; resembling tallow; greasy.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "tallowy":
   adipose, blubbery, buttery, butyraceous, chrismal, chrismatory,
   fat, fatty, greasy, lardaceous, lardy, mucoid, oily, oleaginous,
   oleic, rich, sebaceous, sleek, slick, slippery, smooth, soapy,
   suety, unctuous, unguent, unguentary, unguentous