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Related to leech: Leech therapy
1. noun A person who preys or overly depends upon another, or who clings to another in an parasitic manner. Her younger brother is a bit of a leech, always hanging around us and asking for money.
2. verb To cling to or overly depend upon another person in a parasitic manner, like a leech. She's always leeching off the work other people do in the office.
like a leech
In or having a parasitic, clinging manner or demeanor. Her younger brother is like a leech, always hanging around us and asking for money.
like a leechpersistently or clingingly present.
This idiom refers to the way in which a leech attaches itself by suction to the person or animal from which it is drawing blood: the parasites are very difficult to remove once they are attached to the skin and feeding.