n. One who, or that which, cracks.n. A noisy boaster; a swaggering fellow.n. 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.n. A thin, dry biscuit, often hard or crisp.n. A nickname to designate a poor white in some parts of the Southern United States.n. The pintail duck.n. A pair of fluted rolls for grinding caoutchouc.