blood money
1. Money paid to a hired killer. Here's your blood money, all right? Just get the job done so that no one ever has to see that fool again!
2. Money paid to the family of someone who has been murdered. That settlement is nothing more than blood money. It can't even begin to make up for our father's murder.
3. Money gained at the expense/suffering of others. I don't want this blood money! My mother worked herself to death making it! Many people consider the profits from conflict diamonds to be blood money.