Illusogender

Illusogender is when someone knows they're a certain gender, but experiences a feeling of "fakeness" present, either due to neurodivergency or due to outside pressure, such as from parents, society, etc. These feelings and/or pressures can be part of the gender experience.

Illusogender can be combined with the relevant genders one feels. For example: illusoboy, illusogirl, illusenby, etc.

Flag
The illusogender flag was designed by pride-color-schemes on Tumblr, as known as Pride-Flags on DeviantArt while DeviantArt user FunCatty chose the colors. The flag was posted on September 27, 2015. The color means are unknown. The flag features the famous "duck or rabbit" illusion.

Resources
https://www.deviantart.com/pride-flags/art/Illusogirl-1-562944224

https://www.deviantart.com/pride-flags/art/Illusoboy-1-562944251