Cracker

n. 1. One who, or that which, cracks. 2. A noisy boaster; a swaggering fellow. What cracker is this same that deafs our ears With this abundance of superfluous breath? Shak.

3. A small firework, composed of a thick roll of paper containing a little powder, and exploding with a sharp noise.
4. A hard biscuit.
5. One of a poor class of whites in the southern part of the United States; as, a Georgia cracker. [Cant, U. S.] Bartlett.