Do Yourself (or Oneself) an Injury

Meaning of Idiom ‘Do Yourself an Injury’

When someone tells you “you’ll do yourself an injury” they mean you will hurt yourself, either receiving physical harm or some other damage to yourself, whether emotional, professional, financial, etc. This informal idiom is usually meant as a warning against a certain action. Although the expression rarely used, today, it is most likely to be used in regards to physical injury.

Examples Of Use

“Don’t sell your property now, you’ll do yourself an injury.” (archaic)

“If you try to lift that box by yourself, you’ll do yourself an injury. It’s full of books!”

“Bob did himself an injury by talking to Mr. Foreman that way.”

Origin

This idiom has existed in English since at least the mid-1800’s.

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