crass

from WordNet (r) 3.0 (2006)

crass
    adj 1: (of persons) so unrefined as to be lacking in
           discrimination and sensibility

from The Collaborative International Dictionary of English v.0.48

Crass \Crass\ (kr?s), a. [L. crassus thick, fat, gross, prob.
   orig., closely woven. See {Grease} animal fat, and cf.
   {Crate}, {Hurdle}.]
   Gross; thick; dense; coarse; not elaborated or refined.
   "Crass and fumid exhalations." --Sir. T. Browne. "Crass
   ignorance" --Cudworth.
   [1913 Webster] Crassament

from Moby Thesaurus II by Grady Ward, 1.0

98 Moby Thesaurus words for "crass":
      Boeotian, absolute, arrant, asinine, beef-brained, beef-witted,
      blockish, bovine, broad-bodied, bulky, bullnecked, chumpish,
      churlish, classical, cloddish, coarse, complete, consummate,
      corpulent, cowish, crude, decided, definitive, dense, doltish,
      downright, dullard, dumb, duncical, duncish, earthy, egregious,
      fat, flagrant, full, full-bodied, gaudy, glaring, gross, heavy,
      heavyset, ineducable, inelegant, intolerable, klutzy, loud,
      loutish, lumpish, massive, meretricious, oafish, obscene, opaque,
      out-and-out, outright, perfect, positive, precious, profound,
      pronounced, proper, rank, raw, regular, ribald, rough, rude,
      shattering, shocking, sottish, stark, stark-staring, stupid,
      superlative, surpassing, the veriest, thick, thick-bodied,
      thickset, thorough, thoroughgoing, three-dimensional, total,
      unbearable, unconscionable, uncouth, undeniable, unequivocal,
      unmitigated, unqualified, unrefined, unrelieved, unspoiled,
      unteachable, utter, viscous, vulgar, wrongheaded