bad blood (between A and B)

成語所屬單字blood

bad blood (between A and B) — 慣用語

1. Angry or unfriendly feelings between people.

1.慣用語
釋義

惡感;不和

Angry or unfriendly feelings between people.

例句

There has been bad blood between the two families for years.

Why is there bad blood between you and your cousin?