Source : Webster's Revised Unabridged Dictionary (1913)

Bosh \Bosh\, n. [Cf. G. posse joke, trifle; It. bozzo a rough
   stone, bozzetto a rough sketch, s-bozzo a rough draught,
   sketch.]
   Figure; outline; show. [Obs.]

Bosh \Bosh\, n. [Turk.]
   Empty talk; contemptible nonsense; trash; humbug. [Colloq.]

Bosh \Bosh\, n.; pl. {Boshes}. [Cf. G. b["o]schung a slope.]
   1. One of the sloping sides of the lower part of a blast
      furnace; also, one of the hollow iron or brick sides of
      the bed of a puddling or boiling furnace.

   2. pl. The lower part of a blast furnace, which slopes
      inward, or the widest space at the top of this part.

   3. In forging and smelting, a trough in which tools and
      ingots are cooled.

Source : WordNet®

bosh
     n : pretentious or silly talk or writing [syn: {baloney}, {boloney},
          {bilgewater}, {drool}, {humbug}, {taradiddle}, {tarradiddle},
          {tommyrot}, {tosh}, {twaddle}]