He willingly became a lackey to his superiors, with no principles whatsoever.
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In imperial China, 奴才 was a self-deprecating term male Manchu officials used when addressing the emperor, roughly 'your slave', while Han officials said 臣. Over time it evolved into a derogatory term for a servile person.
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Strongly derogatory in modern usage. Calling someone 奴才 implies they are spineless and slavishly obedient.
