Cracker
Cracker (krak"ẽr) , noun
1.
One who, or that which, cracks.
2.
A noisy boaster; a swaggering fellow. [Obsolete]
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. — Bartlett
6.
(Zoology) The pintail duck.
7.
(Machinery) A pair of fluted rolls for grinding caoutchouc. — Knight