Insomnigender is a xenogender relating to insomnia. One’s gender could feel restless or tired. It could also feel like it is resting at times irregularly. This is not exclusive to people with Insomnia
The term was coined by user TheGamblingDemon otherwise known as MysticalMatter on January 22, 2021 while thinking about what his gender felt like at that time. The flag was created at the same time.
The flag meaning is as follows: black is for the gender's restlessness, and navy blue fading into blue is the gender's feeling of tiredness.