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There are two types of flash mobs:

Caucasian flash mob - Mainly Caucasians and a few Asians who come together to unexpectedly entertain or confuse an existing crowd of people. Features some light-hearted performance or a surprise random form of entertainment.

African flash mob - Mainly Africans and a few hispanics who come together to unexpectedly rob or vandalize a business establishment. Features the surprise theft or destruction of the business owner's property and/or inventory.
1. Christie and Lynn were sopranos in the large chorus flash mob that unexpectedly broke into "Silent Night" for the crowd at the mall courtyard during Christmas Eve last year.

2. Shaqueefa and Lashawnda each stole over $400 in candy, beef jerky and menthol cigarettes and smashed windows and displays as part of the large flash mob that overwhelmed the Qwiktrip last week causing untold damage to the store and injury to the owner.
by Markwonder August 19, 2011
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2
A term used by inner-city youth, usually in a gang and oftentimes African-American. Describes a quick, spontaneous shooting (hence 'flash') of an individual (or perhaps of a small group) by a gang of African-Americans (hence 'mob.')

The term 'flash mob' originated as some kind of strange gimmick where net-savvy nerds met in a public place to do something ridiculous, then quickly disperse.

However, 'flash mob' has gone from being something to laugh at to something to fear. Five or six blacks (or occasionally Mexicans, Asians or even white trash) with guns will jump a rival gang member, someone they have beef with, or even a random person, usually in a dark alley or parking lot, shout "flash mob!" and just open fire. A flash mob could also be a drive-by shooting where there are several shooters.
by LL Jonez November 20, 2012
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A group of people who appear from out of nowhere, to perfom predetermined actions, designed to amuse and confuse surrounding people. The group performs these actions for a short amount of time before quickly dispersing. Flash mobs are often organised through email and/or newsgroup postings.
The flash mob made chicken noises, confusing others around them.
by Loki August 12, 2003
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4
A flashmob is when a large group of people suddenly come together and perform some sort of action, which draws an audience very quickly. After they perform the stunt, the group of people quickly disperse.
Shay Carl, Kassem G, Lisanova, hiimrawn, mysteryguitarman, denisevlogs, and other people came together at the Planet Hollywood Resort and Casino to perform a huge flashmob. It is one of the best flashmobs on YouTube. The video is called "PHAMOUS PLANET HOLLYWOOD FLASH MOB!", uploaded on ShayCarl's channel.
by jlt1 November 30, 2009
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A group of arts students with far too much spare time on their hands that collectively pre-arrange to "spontaneously" burst into song or theatrical performance in public spaces to annoy the general public.
I would go apeshit if a flashmob ever erupted in my presence.
by cynicroute November 29, 2010
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A group of people who are organised via various mass communications to come together at a specified place and time, perform some (typically whimsical) action, then disperse.
"The world's first flashmob was organised in Manhattan, in May 2003, by a man named Bill."
by The Magnetic Field September 15, 2003
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7
N. - A "flash mob" is a organized event where people gather to do a pre-determined action, in a pre-determined place at a pre-determined time. Usually harmless and funny. Think like massive pilow fights in town centers and things of the like. Usually organized on the internet.

Wanna see? Google Video it...
"Dude, did you hear about the flash mob we're setting up next week?"

"Yeah dude, can't wait!"
by Klink January 23, 2007
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