a legend in (one's) own mind(redirected from a legend in his own mind)
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a legend in (one's) own mind
A person who affects or believes that they are of greater importance or notoriety than is actually the case. A humorous, ironic twist on the phrase "a legend in one's own lifetime." The assistant manager acts as if she's the only one keeping the company together. She's a regular legend in her own mind.