firecracker

1. A small explosive device, typically containing a small amount of gunpowder in a tightly-wound roll of paper, primarily designed to produce a large bang.
2. A peanut butter cracker baked with marijuana, similar in concept to an Alice B. Toklas brownie. (slang)
3. Someone or something that is exciting, energetic, or unpredictable. (slang)

الجمع firecrackers