Fantomaticflux is a xenogender and a fluid gender with two possible meanings. The first is that your gender is sometimes solid, and sometimes ghost-like. It’s on a spectrum of its own with any gender at one end (ex. non-binary, female, male, or any other gender), and at the other side of the spectrum, your gender being almost nonexistent, or ghost-like. Fantomaticflux is fluid on this spectrum. The other meaning is when someone feels like they are connected to phantoms through gender, in a way so irrelevant, that they can only describe it as fluid. Somebody can use both meanings, if they want to, but it is not required.
History
Fantomaticflux was coined on March 5th 2021 by the fandom user Astrid The Battery Eater, but due to technical difficulties, it was officially made a page of on March 12th 2021, and the flag was designed by them at the same time.