Spontaneous assembly often organized online

• Virtually organized crowd
• Vulgar book about second public gathering
• Seemingly spontaneous gathering
• Sudden assembly that some find entertaining
• Group behind a public stunt
• Virtually assembled group that performs confusing actions

Wiktionary Word definitions in Wiktionary
n. (alternative spelling of flash mob English)

Wikipedia Word definitions in Wikipedia
Alessandro – now known as Flashmob is an Italian DJ/Producer signed by Objektivity Records ESD Records Avotre Records Defected Records and Get Physical Music . The debut record as Flashmob was ‘Brick House’ , a record that was signed to pioneering Berlin ...