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    loose cannon

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    loose cannon

    Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++loose cannon  → loose cannon at loose1(7) someone who cannot be trusted because they say or do things you do not want them to
    loose cannon


    loose cannonBrE /ˌluːs ˈkænən/ 🔊NAmE /ˌluːs ˈkænən/ 🔊 nouna person, usually a public figure, who often behaves in a way that nobody can predict 大炮（指举止无法预料的知名人士）