1. any underhand interference with production, work, etc., in a plant, factory, etc., as by enemy agents during wartime or by employees during a trade dispute.
2. any undermining of a cause.
example: One of my coworkers tried to sabotage my career. He told lies about me to my boss.
treat someone like dirt : treat someone as useless, 对某人不尊重
反义词： adore someone, idolize someone, worship someone, put someone on a pedestal(当成雕像的底座，很完美)
bring someone down: 打击某人的信心
example: No one like to be around George. He's always bringing people down with his negative comments.
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