Parasitism in modern usage refers to a range of behaviors, both scientific and social behavior in humans. The expression is based on the biological function of a parasite living off another organism. In its social sense, it's a highly derogatory statement used to describe and denigrate the behavior of others. It may refer to an individual or group behavior.
Examples of Parasitism:
|Biological: A tick is an organism which lives on parasitism, sucking the blood of its host.|
Social: Organized crime is organized parasitism, sucking the blood of society.
Personal: So and so is a form of incarnate parasitism, living off others.
Mites parasitising a harvestman
A female Catolaccus grandis wasp is attracted by a boll weevil larva.