an aquatic or terrestrial annelid worm with suckers at both ends. Many species are bloodsucking parasites, especially of vertebrates, and others are predators

a person who extorts profit from or sponges on others

they are leeches feeding off the hard-working majority

habitually exploit or rely on

he's leeching off the abilities of others

a doctor or healer

the after or leeward edge of a fore-and-aft sail, the leeward edge of a spinnaker, or a vertical edge of a square sail