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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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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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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Flashmobs, group who are likely less than 1 degree of seperation from each other meet up and attempt to get the media to pay attention, before going back to their subversive blogs.

A furniture store was closed and had to be opened by the manager to allow the "spontaneous" flashmob in. He saw the chance for free advertising and got it with TV news.
by bebble September 04, 2003
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a large group of black people mobilized by social media to meet in a public place for the purpose of doing illegal or criminal activity of short duration.
A Black Flash Mob hit up a 7-11 in Philadelphia. They completely cleaned them out!
by JOhnny Jizzer August 19, 2011
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The practice of gathering a large group of African-American people together in a crowded environment and simultaneously beginning to target and assault any white people in the vicinity. It is similar to a traditional flash mob in that the event is pre-planned via text message, social networking, or e-mail. Instead of breaking out into a coordinated song and dance, the people involved assault nearby white people and vandalize and loot nearby vendors.
For example, on August 4, 2011, a group of approximately 100 Africa-American teenagers launched a Milwaukee Flash Mob at the state fair grounds in West Allis, WI following an M.C. Hammer concert.
by milwaukeemayhem August 07, 2011
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