to knock the competition 诋毁对手(非正式用语)
英文释义
To make insulting, disrespectful comments about one's competitors in business, or their products (NOTE: this is a negative, unethical practice)
例句
The insecure salesman tried to knock the competition by saying that their employees were stupid and unreliable people who could not find work anywhere else.
这位无把握的销售员试图诋毁竞争对手,说他们的员工愚蠢而不可靠,在别的地方根本找不到工作。