He willingly became a lackey to his superiors, with no principles whatsoever.
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history
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 (chén). 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.
