Used in two forms, the former used more popularly;

1. Kg/m^2 of living materials in an ecosystem

2. Mob of people, population
Dude, look at that huge biomass of mutant radioactive zombies!
by suicidoll June 5, 2006
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When all that's left of you is your body, and your soul has evacuated... i.e. to perish, to die, often by ones own hand. Often cited in the videogame 'EVE Online' due to an affect that happens to your character when it dies, resulting in a corpse floating in space with the item category: 'biomass'.
Person 1: Hey, I just spent my last 2$ to my name on a lottery ticket and got nothing back... can you hook me up with a smoke?
Person 2: Bro, just Biomass.
by M0tan April 10, 2017
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A term used to refer to someone who is so stupid and pointless that their existance is a waste. It literally means that the organic matter that makes up their body could have ben put to -much- better use, such as maybe making a few cats, or some bugs, or even a few trillion bacteria, all of which would be more beneficial to the earth than the sorry excuse for a human being referred to.
Most of the kids at my school are nothing but big wastes of biomass.
by RZ October 5, 2003
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A word for the Russian human-wave tactics. A person is only worth as another faceless suicide runner. Therefore, they are essentially biomass, humans, but not really as they are only for mindless massacre.
"These Russian soldiers, the way to suicidally run towards enemy fire, they really are just biomass."
by KyoshiroOfHonor March 21, 2023
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Alternative definition of a morbidly obese ham planet/land whale.
Omg, a biomass in a Walmart wheelie cart almost ran my ass down to get his/her chubby hands on the sale cookies!
by Kodydapony February 3, 2018
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