boo word

noun
🔊/ˈbuː wɜːd/
🔊/ˈbuː wɜːrd/
(British English, informal)
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  1. a word or an expression for something that people dislike or think is bad引发嘘声的词;令人反感的说法
    • Elitism has become a boo word in education.精英主义在教育领域已经成为不受欢迎的字眼。