Flash Mob Definition
noun
An often impromptu and unannounced gathering of people in a public place, organized by means of social media.
Webster's New World
A group of people who converge on a spot with little forewarning, perform some action (usually a protest or a dance), and disperse quickly.
Wiktionary
Other Word Forms of Flash Mob
Noun
Singular:
flash mobPlural:
flash-mobsOrigin of Flash Mob
The term "flash crowd" was coined by Larry Niven in Flash Crowd, a story about cheap teleportation in the future.
From Wiktionary
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