Definition
To have a strong personal opinion or motive that influences one's actions, often with a desire to persuade others to agree.
别有用心
The new manager seems to have an axe to grind about how our department is run; I suspect he's looking to shake things up.
新經理似乎對我們部門的運作方式有強烈意見，我懷疑他想要進行改革。
She doesn't really care about the policy; she just has an axe to grind against the current administration, with her own agenda.
她其實並不在乎這項政策，她只是對現任政府有個人成見，並有自己的議程。
I don’t think he’s making these criticisms from a place of fairness; he clearly has an axe to grind and is using this as an opportunity for revenge.
我不認為他的批評是出於公平，他顯然有個人動機，並利用這次機會進行報復。