Crack″er (krăk″ẽr), n. 1. One who, or that which, cracks.
2. A noisy boaster; a swaggering fellow.
What cracker is this same that deafs our ears?
Shak.
3. A small firework, consisting of a little powder inclosed in a thick paper cylinder with a fuse, and exploding with a sharp noise; — often 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. (Zoöl.) The pintail duck.
7. pl.(Mach.) A pair of fluted rolls for grinding caoutchouc. Knight.