- a spontaneous public gathering of people organized via the internet.
-- Citation removed to resolve a penalty against The Online Slang Dictionary. From "Ideas & Trends: Flash Mobs; Guess Some People Don't Have Anything Better to Do", The New York Times, Amy Harmon, August 17 2003
- The term "flash crowd" was introduced by author Larry Niven in his novella Flash Crowd.
-- Walter (email@example.com)