Bloodsucker

Part of speech: noun (n.)

1. Any animal that sucks blood; esp., the leech (Hirudo medicinalis), and related species.

2. One who sheds blood; a cruel, bloodthirsty man; one guilty of bloodshed; a murderer. [Obs.] Shak.

3. A hard and exacting master, landlord, or money lender; an extortioner.