leech
The biological sense refers to a segmented worm known for its blood-sucking capabilities, often associated with historical medical practices. This creates a visceral image of parasitic attachment and depletion. When applied to people, the term carries a heavy negative connotation of social parasitism. It describes an individual who drains the resources, finances, or emotional energy of others without offering any reciprocity, evoking a sense of resentment and unfairness.
Meanings
An aquatic worm that attaches itself to a host to feed on blood.
"The doctor used a leech to reduce the swelling in the patient's arm."
A person who habitually exploits others for their own gain without giving anything in return.
"He is a total leech who has been living off his parents for years."