The DICT Development Group

  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

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

  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