A mob is a large, disorganized, and often violent crowd of people.

People sometimes use the mob to refer in a disapproving way to the majority of people in a country or place, especially when these people are behaving in a violent or uncontrolled way.

You can refer to the people involved in organized crime as the Mob .

If you say that someone is being mobbed by a crowd of people, you mean that the people are trying to talk to them or get near them in an enthusiastic or threatening way.