Source : Webster's Revised Unabridged Dictionary (1913)

Hunch \Hunch\, n.
   A strong, intuitive impression that something will happen; --
   said to be from the gambler's superstition that it brings
   luck to touch the hump of a hunchback. [Colloq. or Slang]

Hunch \Hunch\, n. [Perh. akin to huckle; cf. hump, hunch, bunch,
   hunk.]
   1. A hump; a protuberance.

   2. A lump; a thick piece; as, a hunch of bread.

   3. A push or thrust, as with the elbow.

Hunch \Hunch\, v. t. [imp. & p. p. {Hunched}; p. pr. & vb. n.
   {Hunching}.]
   1. To push or jostle with the elbow; to push or thrust
      suddenly.

   2. To thrust out a hump or protuberance; to crook, as the
      back. --Dryden.

Source : WordNet®

hunch
     n 1: an impression that something might be the case; "he had an
          intuition that something had gone wrong" [syn: {intuition},
           {suspicion}]
     2: the act of bending yourself up together

hunch
     v : arch one's back [syn: {hump}, {hunch forward}, {hunch over}]