Charles_Stuart,_that_man_of_blood
Charles Stuart, that man of blood was a phrase used by Independents, during the English Civil War to describe King Charles I.
The phrase is derived from the Bible:
And thus said Shimei when he cursed, Come out, come out, thou bloody man, and thou man of Belial: The LORD hath returned upon thee all the blood of the house of Saul, in whose stead thou hast reigned; and the LORD hath delivered the kingdom into the hand of Absalom thy son: and, behold, thou art taken in thy mischief, because thou art a bloody man.
This and another verse were used to justify regicide:
So ye shall not pollute the land wherein ye are: for blood it defileth the land: and the land cannot be cleansed of the blood that is shed therein, but by the blood of him that shed it.