bleed (someone) white
To take all of the money that another person has, often through blackmail. The maid bled her famous employer white until he could no longer pay her the hush money.
bleed someone white
and bleed someone dryto take all of someone's money; to extort money from someone. The creeps tried to bleed me white. Richard got a picture of Fred and Joan together and tried to bleed both of them dry by threatening to show it to their spouses.