Fundis is short for fundamentalists. The term was used for a faction within the German Green Party. The faction was formed in conflict to the Realo-faction within their party. The term has also been applied to similar conflicts.
The abbreviation Fundi is a label applied to members who tend towards a fundamentalist interpretation of its common ideology (e.g. 'green' values), as opposed to the more " pragmatic realism " of the Realo alternative. Other terms for green Fundis are wild greens or deep greens. They tend towards veganism, a strong animal rights approach and an aversion to traditional political methods, preferring to maintain decentralized grassroots organization over a more centralized system of governance.
In the 1980s and 1990s, a conflict between the Fundis and the Realos with the German Green Party arose. While the Realos, the group around Joschka Fischer, were in favour of moderate policies and cabinet cooperation, the Fundis opposed cabinet cooperation. The Fundis were composed of deep greens and eco-socialists. They did not only oppose cabinet cooperation, but were also in favour of strict term limits.
The term was first used within the Hessen Green party. In the 1982 state elections the party gained 8% of vote, and neither the SPD or the CDU had a majority of their own. In their program Hessen Greens had claimed that there was a "fundamental opposition between the anti-life and anti-democratic politics of the SPD, CDU and FDP." Those who had opposed a coalition with the SPD were called Fundis. The Greens tolerated an SPD-minority government for three years and in 1985 they entered the coalition, a victory for the Realos. Joschka Fischer became their minister.