have an ax to grind
US /hæv ən æks tuː ɡraɪnd/
UK /hæv ən æks tuː ɡraɪnd/

1.
ada dendam peribadi, ada motif tersembunyi
to have a private reason for doing or being involved in something, especially a selfish one
:
•
He seems to have an ax to grind with the company, always criticizing their policies.
Dia nampaknya ada dendam peribadi dengan syarikat itu, sentiasa mengkritik dasar mereka.
•
I don't have an ax to grind; I'm just stating the facts.
Saya tidak ada motif tersembunyi; saya hanya menyatakan fakta.