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]