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.