Meaning

3 senses
  1. A large audience for a sporting event that is unexpected because of large numbers of game-day ticket sales rather than advance tickets.

  2. A crowd that forms suddenly.

  3. (obsolete)The fashionable public.

Forms

plural: flash crowds
Singularflash crowd
Pluralflash crowds

regular

See also

neighbours in the dictionary
flash crowd — meaning, examples, forms, synonyms | Krumeto