the religious belief that Green Day is the absolute greatest band ever.
I'm a member of the Greenist Church, aka the Church of Green Day.
by AD9 March 28, 2004
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A rising trend in 2021 is Greenism which is the diet of only eating sustainably sourced food.

Similar to being a Flexitarian, Greenism is only eating meat and other non-plant foods when it has been sourced ethically and locally. This also correlates to the vegetables and plant foods. Not only does following a Greenism Lifestyle mean you are helping local farmers with their lively hoods, it also means you aren't creating a carbon footprint (and deforestation) from ordering avocados that were harvested in Brazil!
Mandy is vegan and thinks she is helping save the planet. She likes tofu but she doesn't know that soybeans are fueling heavy industrial processes and is actually killing the planet. Mandy would be better off taking up a greenism diet, and just buying local.
by TheGreenismGuy November 19, 2021
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