Flash mobbing

/flˈaʃ mˈɒbɪŋ/

/flˈæʃ mˈɑːbɪŋ/

Flash mobbing

an act of organizing a large group of people using social media to gather them together publicly at an exact time, doing something for a short time and then dispersing

Examples

1. Okay, there’s no manager of flash mobbing, it just emerges.