Top Definition
A Sustainabilist is someone who rejects as false the premise that the future cannot be as good or plentiful as the past or present. They value the future and are ready to fight for options that help society continue thriving while maintaining environmental well being and social justice. In short, they are the greatest Champions the Earth has ever seen.
Person One: "BRRR it's cold in here! Someone please turn up the heat!"
Person Two: "No way dude, be a Sustainabilist and put on a sweater."
by SunflowerChampion June 30, 2011

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