mob
Definitions
A large, disorganized, and often violent crowd of people.
An organized crime syndicate or gang.
To crowd around someone or something in an aggressive or overly enthusiastic manner.
Examples
An angry mob gathered outside the town hall to protest the new tax laws.
The celebrity was quickly surrounded by a mob of enthusiastic fans as soon as she stepped out of the car.
The police struggled to control the unruly mob that had formed in the city center.