Genderbox is a gender under the fluidflux umbrella that is made of different fluctuating "parts" that blend together to create a single, changing gender. The "parts" can be gender qualities, individual genders, gender alignments, or anything that could be part of a gender.
Each "part" fluctuates independently of the others, creating different combinations at different times. For example, if an individual's parts are feminine, masculine, and xenine, they will be androgyne when their feminine and masculine parts are present, and a xenogirl when their feminine and xenine parts are present.
Metaphorically, the gender is a box, and the parts are items inside of the box that change with time. When the content of the "gender box" changes, the gender feels different, but it is still the same gender, just with a different feeling.
The "box" might have genders or gender qualities "attached" to the outside, which aren't "parts" of the gender and are always present. These "attachments" can blend with the "contents" of the box, or they can be felt separately.
When a part's intensity is low, it might become agender, disappear, become a base gender, or be overpowered by other parts. When all of one's parts are low in intensity, one might be agender, be a base gender, and/or be their attachment(s), if they have any.
Genderbox can be a monogender, if one sees it as a single gender composed of multiple parts, or a multigender if one sees it as multiple genders coming together to form a single experience and/or if they experience their attachments as separate genders.
History
Genderbox was coined on July 11, 2022 by Reddit user -Solidwater.[1]
Flag
The genderbox flag is composed of seven stripes. They are, from top to bottom: white, brown, purple, grey, orange, brown, and black.
White represents multigenders and genders blending together. Brown represents boxes. Purple represents the binary genders. Grey represents fluctuating traits, qualities and/or genders. Orange represents non-binary genders. Black represents genderlessness.
Purple and orange because they're blends of colors, similarly to how genderbox is a blend of genders. The purple, orange and grey are between the brown stripes to represent being 'inside the box', and white and black are outside of the box to represent attachments.