Freeganism is an anti-consumerist lifestyle whereby people employ alternative living strategies based on limited participation in the conventional economy and minimal consumption of resources.
Freegans "embrace community, generosity, social concern, freedom, cooperation, and sharing in opposition to a society based on materialism, moral apathy, competition, conformity, and greed." Freeganism involves choosing to salvage discarded, unspoiled food from supermarket dumpsters, known as 'dumpster diving'.
Freeganism started in the mid 1990s, out of the antiglobalization and environmentalist movements. The movement also has elements of Diggers, an anarchist street theater group based in Haight-Ashbury in San Francisco in the 1960s, that gave away rescued food. [wikipedia]