An unfilial or rebellious son, and a disloyal official or minister who serves two masters (often implying betrayal or opportunism).
那个项目经理背弃了与团队的承诺，又泄露了商业秘密，同事们都称他为逆子贰臣。
That project manager betrayed his promises to the team and divulged business secrets; his colleagues called him a rebellious son and a disloyal official.
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