The Collaborative International Dictionary of English v.0.48:

Tripe \Tripe\, n. [OE. tripe, F. tripe; of uncertain origin; cf.
   Sp. & Pg. tripa, It. trippa, OD. tripe, W. tripa, Armor.
   stripen.]
   1. The large stomach of ruminating animals, when prepared for
      food.
      [1913 Webster]

            How say you to a fat tripe finely broiled ? --Shak.
      [1913 Webster]

   2. The entrails; hence, humorously or in contempt, the belly;
      -- generally used in the plural. --Howell.
      [1913 Webster]

WordNet (r) 3.0 (2006):

tripe
    n 1: lining of the stomach of a ruminant (especially a bovine)
         used as food
    2: nonsensical talk or writing [syn: folderol, rubbish,
       tripe, trumpery, trash, wish-wash, applesauce,
       codswallop]

Moby Thesaurus II by Grady Ward, 1.0:

81 Moby Thesaurus words for "tripe":
   abatis, abdomen, anus, appendix, baloney, bilge, blah, blah-blah,
   blind gut, bop, bosh, bowels, brain, brains, bull, bullshit, bunk,
   bunkum, cecum, chitterlings, cockscomb, colon, crap, duodenum,
   endocardium, entrails, flapdoodle, foregut, gas, giblets, gizzard,
   guff, gup, guts, haslet, heart, hindgut, hogwash, hokum, hooey,
   hot air, innards, inner mechanism, insides, internals, intestine,
   inwards, jejunum, kidney, kidneys, kishkes, large intestine, liver,
   liver and lights, lung, malarkey, marrow, midgut, moonshine,
   perineum, piffle, poppycock, pump, pylorus, rectum, rot, scat,
   shit, small intestine, spleen, stomach, sweetbread, ticker,
   tommyrot, tongue, tripes, vermiform appendix, viscera, vitals,
   wind, works