Cassgenderfae is a subset to cassgender where one feels that their gender is unimportant or where one is indifferent to the idea of gender, but knows that they don't have a male or masculine gender. Cassgenderfae is different from a lack of gender, as a cassgenderfae individual might have a gender but not feel that it's an important part of their identity.
The masculine counterpart is Cassgenderfaun.
A related term is cassflux, where the level of indifference fluctuates. Sometimes one might feel completely indifferent towards gender, but at other times gender might feel more important.
History
The term was coined by Tumblr user kyressin on November 16th of 2017.
Flag
The flag was coined by Tumblr user kyressin on November 16th of 2017. It has no confirmed meaning.
Resources
https://kyressin.tumblr.com/post/167573235764/i-have-coined-a-new-gender-term-cassgenderfae-a