俚语：Shake-down/敲诈，勒索

　　定义：an illegal demand for money; extortion, blackmail; to blackmail不合法的取得金钱；强夺，勒索；勒索

　　例句：The police finally put a stop to the shake-down operation that had victimized the business community.勒索事件危害商业界，警方终于将其制止。