The term "Figma OS" or "FigmaOS" is usually used in reference to fake operating systems designed by a small group of people who use Figma for their promotional videos. Examples include "AmeOS."
The term can also be applied to "indie" operating systems that only showcase a few of their features and mostly focus on one design without demonstrating the UX (User Experience) in their designs. Examples include "Luminate OS" and "Fimpid OS."
These "operating systems" are typically found on YouTube, where they promote their "OSes" primarily as Android skins or Custom ROMs. However, it's most likely false advertising, as these "operating systems" most likely use Figma for their promotional videos.
A: Fimpid OS is going to change the world! Just look at their designs!
B: No it won't. Another Figma OS lmao.