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flash mob - definition and synonyms

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verb [intransitive]     flash mob pronunciation in American English
  1. to suddenly gather in a public place, do something for a short time, and quickly go away again
    1. a.
      [transitive] [often passive] to surprise someone by going in a large group to the place where they are, doing something for a short time, and quickly going away again

derived words

flash mobbing

     flash mobbing pronunciation in American English
noun [uncountable]

flash mobber

     flash mobber pronunciation in American English
noun [countable]
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