Source : Webster's Revised Unabridged Dictionary (1913)

Poke \Poke\, n.
   1. The act of poking; a thrust; a jog; as, a poke in the
      ribs. --Ld. Lytton.

   2. A lazy person; a dawdler; also, a stupid or uninteresting
      person. [Slang, U.S.] --Bartlett.

   3. A contrivance to prevent an animal from leaping or
      breaking through fences. It consists of a yoke with a pole
      inserted, pointed forward. [U.S.]

   {Poke bonnet}, a bonnet with a straight, projecting front.

Source : WordNet®

poke bonnet
     n : a hat tied under the chin [syn: {bonnet}]