the.com/bloodsucker
A creature, or a person, who thrives by quietly draining what keeps you alive.
means Literally an animal that feeds on blood, or figuratively someone who exploits others for money or energy.
from A plain English compound, blood plus sucker, attested since the 1300s for leeches and bats — then promoted to insult duty for landlords, loan sharks, and in-laws.
Leech medicineStill FDA-approved for restoring blood flow after surgery.
Vampire batsOnly three of 1,400 bat species drink blood.
Mosquito truthOnly females bite, needing protein for eggs.