What is the meaning of Cracker?

A dry, thin, crispy baked bread (usually salty or savoury, but sometimes sweet, as in the case of graham crackers and animal crackers).

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.

A firecracker.

A person or thing that cracks, or that cracks a thing (e.g. whip cracker; nutcracker).

  1. The final section of certain whips, which is made of a short, thin piece of unravelled rope and produces a cracking sound.

    The final section of certain whips, which is made of a short, thin piece of unravelled rope and produces a cracking sound.

    A Christmas cracker.

    Refinery equipment used to pyrolyse organic feedstocks. If catalyst is used to aid pyrolysis it is informally called a cat-cracker

    A fine, great thing or person (crackerjack).

    An ambitious or hard-working person (i.e. someone who arises at the 'crack' of dawn).

    One who cracks (i.e. overcomes) computer software or security restrictions.

    A noisy boaster; a swaggering fellow.

    An impoverished white person from the southeastern United States, originally associated with Georgia and parts of Florida; any white person (slang).

    A police officer.

    A northern pintail, species of dabbling duck.

    A pair of fluted rolls for grinding caoutchouc.

    Alternative form of krekr

    drug user

    Source: wiktionary.org