Bloodsucker (noun)

A person or thing that takes advantage of others, especially by taking their money or resources.

Origin:

From blood + sucker, from the action of sucking blood.

Examples:

1. He was a bloodsucker who preyed on the weak and vulnerable.
2. The company was run by a group of bloodsuckers who were only interested in their own profit.
3. The lawyer was a bloodsucker who charged exorbitant fees.
4. The bloodsuckers at the company were always looking for ways to cut costs.
5. He was called a bloodsucker because he always wanted more money.