Source : Webster's Revised Unabridged Dictionary (1913)

Popper \Pop"per\, n.
   A utensil for popping corn, usually a wire basket with a long
   handle.

Popper \Pop"per\, n.
   A dagger. [Obs.] --Chaucer.

Source : WordNet®

popper
     n 1: a container of stimulant drug (amyl nitrate or butyl
          nitrite)
     2: a container for cooking popcorn