bad blood

(noun) bad feelings, a history of bad feelings


Example Sentences:

There is bad blood between my ex-girlfriend and I, so I try to avoid her.

There is a lot of bad blood between the Smith Family and the Jones family, and they have been fighting for years.

From the Blogs:

Boeing potential move draws bad blood in Washington

Media:

Similar idioms:

1. blood is thicker than water
2. no hard feelings