It means that they didn't get along. Most likely something happened and the two parties are angry with each other.
The right ventricle has deoxgenated blood in it if that is what you mean by "bad blood". The left ventrical has oxgenated blood in it, or what you mean by "good blood"
To stir up bad blood means to be a bad role model to others by doing bad things.
If you mean a good kind of blood clot, Vitamin K is required. If you mean bad blood clot, I don't know.
There's no bad blood between our countries.
You probly have bad blood flow to your legs
There is no proof of it but there was bad blood between them
The match between HHH and HBK at Bad Blood 2004 lasted for about 46-48 minutes
Its not bad, it might mean they are too cold, something is wrong w/ them or you are abusing them.
Menstrual blood is a mixture of blood and uterine lining tissue, which is not found in regular blood.
It can mean very bad things, like internal bleeding and a trip to the hospital.
It mean you had a bad dream.
This sort of thing usually refers to Blood Pressure. Systolic vs Diastolic blood pressure, or, pressure of your blood when your heart is beating and between beats. Whether 112 over 58 is good or bad depends on your age, sex, and fitness.