MOBBING

To crowd around (someone), sometimes with hostility.

"The fans mobbed a well-dressed couple who resembled their idols."

To crowd into or around a place.

"The shoppers mobbed the store on the first day of the sale."

To wrap up in, or cover with, a cowl.

The aggressive behaviour of a group of animals on another individual (especially a predator).

Group bullying.

Mob programming.