cliché: bad blood

Meaning: animosity between people (definition).

Example: A good fence often keeps bad blood between neighbors from escalating into a good war.

Origins: Blood and emotions; among first uses, Essays of Elia by Charles Lamb in 1823. (Source.)

Rewrites:

• foul blood
• tainted blood
• bile in the blood
• vein hatred
• ill tempered muscle
• fury in the guts

Discussion: I have tried to rework both the concept of emotion and where that emotion resides.