flash-bang n. an explosive device that emits noise and light but is not intended to cause damage. Editorial Note: Flash-bang grenade is the full, more common, form. (source: Double-Tongued Dictionary)
Further reading
That sputtering noise when someone sticks out their tongue, puts their lips together, and blows is called a raspberry. No one knows the origin of this slang term, although it may have to do with that pileup of consonants colliding in the middle of...
Your first name is very personal, but what if you don’t like it? For some people, changing their name works out great but for others it may create more problems than it solves. And: at least three towns in the U.S. were christened with names...
Tom Clancy uses this word alot in his earlier books.
Also a commonly used term in theatrical and film special effects.