WordWeb Online

1. A small high-velocity shell; it makes a whizzing sound followed by a bang when it hits
   - whizzbang, whizbang shell
    
2. A firecracker that (like the whizbang shell) makes a whizzing sound followed by a loud explosion
   - whizzbang

Derived forms: whizbangs

Type of: banger [Brit], cracker, firecracker, shell