noun.
A dry, thin, crispy, and usually salty or savory biscuit.
noun.
A short piece of twisted string tied to the end of a whip that creates the distinctive sound when the whip is thrown or cracked.
noun.
A firecracker.
noun.
A person or thing that cracks, or that cracks a thing (e.g. whip cracker; nutcracker).
noun.
A Christmas cracker
noun.
Refinery equipment used to pyrolyse organic feedstocks. If catalyst is used to aid pyrolysis it is informally called a cat-cracker
noun.
A fine thing or person (crackerjack).
noun.
An ambitious or hard-working person (i.e. someone who arises at the 'crack' of dawn).
noun.
One who cracks (i.e. overcomes) computer software or security restrictions.
noun.
A noisy boaster; a swaggering fellow.
noun.
The pintail duck.
noun.
A pair of fluted rolls for grinding caoutchouc.
noun.
An impoverished white person from the southeastern United States, originally associated with Georgia and parts of Florida; by extension: any white person.