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have a nerve

Also, have some nerve. Have audacity, show effrontery. For example, You have a nerve telling me what to do, or She had some nerve, criticizing the people who donated their time. The related have the nerve is used with an infinitive, as in He had the nerve to scold his boss in public. This idiom uses nerve in the sense of “courage” or “audacity.” [Late 1800s]

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.