What is the meaning of Cracker?

A noisy boaster; a swaggering fellow.

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

A prawn cracker.

The final section of certain whips, which is made of a short, thin piece of unravelled rope, or which is a short piece of twisted string tied to the end of the whip, which produces a distinctive cracking sound when the whip is cracked.

A firecracker.

A Christmas cracker.

A northern pintail, a dabbling duck of species Anas acuta.

A person or thing that breaks a thing (e.g., nutcracker).

  1. Refinery equipment used to pyrolyse organic feedstocks. If catalyst is used to aid pyrolysis it is informally called a cat-cracker
  2. A pair of fluted rolls for grinding caoutchouc.
  3. One who cracks (i.e. overcomes) computer software or security restrictions.

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

    A pair of fluted rolls for grinding caoutchouc.

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

    A fine, great thing or person (crackerjack).

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

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

    (Can we verify this sense?) A police officer.

    alternative form of krekr

    drug user

    Source: wiktionary.org