2 definitions by ben-mactavish

A phrase often used by science deniers, usually against the scientific theory of evolution. It implies that a "theory" is just an unproven "guess", therefore evolution is an unproved lie. This stems from a fundamental misunderstanding of the word "theory" in the context of science.

In colloquial use, a 'theory' may mean a "guess", but in Science, a 'theory' is defined as "a well-substantiated explanation of an aspect of the natural world." Therefore the phrase "Evolution is just a theory" makes no sense.
A: Evolution is just a theory!
B: Yes, it is. It's a scientific theory that is supported by the best available evidence. Cell theory is a theory too, do you deny that we are made of cells? And gravity is a theory too, do you jump off of bridges?
by ben-mactavish August 16, 2022
The guy who grew potatoes on Mars using his own shit as fertilizer.

He is from Andy Weir's book "The Martian" (2011) and was portrayed by Matt Damon in the 2015 film with the same name.
There're two things that Mark Watney hates.
Disco and Potatoes
by ben-mactavish January 20, 2021