cracker

noun

1. 1

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

2. 2

   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.

3. 3

   A firecracker.

4. 4

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

5. 5

   A Christmas cracker.

6. 6

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

7. 7

   A fine thing or person (crackerjack).

   “She's an absolute cracker!”

8. 8

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

9. 9

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

10. 10

    A noisy boaster; a swaggering fellow.

11. 11

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

12. 12

    (Florida) A police officer.

13. 13

    A northern pintail, species of dabbling duck.

14. 14

    A pair of fluted rolls for grinding caoutchouc.