1. 暴民;乌合之众
    A mob is a large, disorganized, and often violent crowd of people.

    e.g. Bottles and cans were hurled on the terraces by the mob...
           暴徒向看台扔瓶子和罐子。
    e.g. The inspectors watched a growing mob of demonstrators gathering.
           督察们看见越来越多愤怒的示威者聚集到一起。

2. 大众（含贬义）；（尤指）愤怒暴乱的群众
    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.

    e.g. If they continue like this there is a danger of the mob taking over...
           如果他们继续这样下去，就有可能被暴动的群众控制局面。
    e.g. They have been exercising what amounts to mob rule.
           他们一直在实行相当于暴政的统治。

3. 黑社会；犯罪集团
    You can refer to the people involved in organized crime as the Mob .

mob是什么意思

    e.g. ...casinos that the Mob had operated...
           黑社会经营的赌场
    e.g. It was a Mob killing.
           这是一宗黑社会犯下的杀人案件。

4. 团团围住;成群围住
    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.

mob

    e.g. Her car was mobbed by the media...
           她的车被媒体团团围住了。
    e.g. They found themselves being mobbed in the street for autographs.
           他们发现自己被索要签名的人群围堵在大街上。