mend one's ways

mend one's ways idiom
Improve one's behavior, as in Threatened with suspension, Jerry promised to mend his ways. This expression, transferring a repair of clothes to one of character, was first recorded in 1868, but 150 or so years earlier it had appeared as mend one's manners.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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