knocking copy

noun
🔊/ˈnɒkɪŋ kɒpi/
🔊/ˈnɑːkɪŋ kɑːpi/
[uncountable] (British English, informal)
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  1. advertising in which an opponent’s product is criticized诋毁性广告(针对竞争对手)
    • Knocking copy is simply lazy journalism.诋毁性报道不过是一种偷懒的新闻写作方式。