People who pretend to be someone they are not in order to deceive others.
From French 'imposteur', from Latin 'impostor' (from 'imponere' meaning to place upon, deceive). The 'im-' prefix means in or upon, and '-positor' means placer, so literally 'one who imposes upon' or deceives.
Interestingly, 'impostor syndrome'—where successful people feel like frauds—became a major psychological concept in the 1970s, suggesting that as societies became more mobile, people lost the traditional markers of belonging and everyone worried about being exposed as a fake.
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