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
It’s the ultimate road trip: A father and son retrace the journey of Odysseus and find a way to navigate their relationship. Plus, the story behind the phrase a flash in the pan: It has nothing to do with cooking or gold mining. Also, what’s a...
In 1916, a small-town newspaper in Pennsylvania printed a fanciful item about a local gathering with a guest list that included, among others, Miss Ella Vader, Mr. Ray Zor, and other punny names. This is part of a complete episode. Transcript of...
Tom Clancy uses this word alot in his earlier books.
Also a commonly used term in theatrical and film special effects.