Glimmergender is a xenogender in which someone feels their gender is like a distant and dim light in the middle of the darkness, in which they don't know what it is, they just know it is there. It was created by a neurodivergent non binary person[1], but anyone can use it.
Flags
Twitter user @enbyfrost[1] created the foxgender flag on the 26th of April, 2021. The shades of blueish dark in the flag is to represent the darkness being lighted by the dim distant light.
References