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.