Cracker /(krăk"ẽr)/

Crack·er

Cracker

n.
  1. One who, or that which, cracks.
  2. A noisy boaster; a swaggering fellow. [Obs.]
    What cracker is this same that deafs our ears?
  3. A small firework, consisting of a little powder inclosed in a thick paper cylinder with a fuse, and exploding with a sharp noise; -- usually called firecracker.
  4. A thin, dry biscuit, often hard or crisp; as, a Boston cracker; a Graham cracker; a soda cracker; an oyster cracker.
  5. A nickname to designate a poor white in some parts of the Southern United States.
  6. The pintail duck. (Zool.)
  7. A pair of fluted rolls for grinding caoutchouc. (Mach.)