Definition from Wiktionary, the free dictionary
firecracker (plural firecrackers)
- A firework consisting of a string of bangers linked by a fuse designed to emit a series of loud bangs when lit. Traditionally used in Chinese celebrations (e.g. Chinese New Year) to scare off ghosts and bad spirits and to bring good luck.
- A peanut butter cracker baked with marijuana, similar in concept to an Alice B. Toklas brownie.
- A person who is exciting and/or unpredictable.