Fluidbigender flag
Fluidbigender is a term that means one's gender is bigender, but both genders are genderfluid and changing. For example, one time one may feel female and demiboy, and another deminonbinary and male.
History
The term was coined by someone who has asked to keep its information private sometime before October 13th, 2020.
Flag
The flag was coined by the same person on the same date. It is a mix of the bigender and genderfluid flag.