What is the meaning of the sentence ‘He is acting like he has an axe to grind in this issue’?

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English Grammar Practice Test: Idioms — practice the complete quiz, review flashcards, or try a random question.

An idiom is a phrase that has a meaning that is different from the literal meaning of the words used. For example, "kill two birds with one stone" is an idiom.


What is the meaning of the sentence ‘He is acting like he has <em>an axe to grind</em> in this issue’?