The term Grexian relates to feeling as if your genders are a "flock" and have their own lives, it can be fluid or the genders can stay the same. This includes genders and xenogenders. It also may be nature related, though it does not have to be.
History
The term was coined on January 7th, 2022 by FANDOM user Sophieeevee. The flag was created by the same user on the same day. There was no official coining of the term or the flag.
Flag
The colors of the flag represent: Dark green represents nature and life, blue represents fluidity and flow, and black, grey and white represent the unlimitedness of genders.