One who attempts to take as much from others as possible; a leech.
An animal that drinks the blood of others, especially by sucking blood through a puncture wound; a hemovore.
The changeable lizard (Calotes versicolor).
A vampire.
Any parasite.
Someone who obtains goods or services legally without paying.
A worker at an open shop who is able to enjoy the benefits negotiated by a union without being a member of the union.
One who obtains benefit from a public good without paying for it directly.