1. (n.) One who, or that which, cracks.

2. (n.) A noisy boaster; a swaggering fellow.

3. (n.) A small firework, consisting of a little powder enclosed in a thick paper cylinder with a fuse, and exploding with a sharp noise; -- often called firecracker.

4. (n.) A thin, dry biscuit, often hard or crisp; as, a Boston cracker; a Graham cracker; a soda cracker; an oyster cracker.

5. (n.) A nickname to designate a poor white in some parts of the Southern United States.

6. (n.) The pintail duck.

7. (n.) A pair of fluted rolls for grinding caoutchouc.

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