Bigenderboth is a gender in the bigender system in which one has two genders, but how they experience both genders is fluid. One can be both or a mix, but is never either gender separately.
An example of a bigenderboth individual would be someone who is fluid between man and non-binary. They may be both man and non-binary or a mix of the two, but is never either separately.
This term was coined on October 5, 2021 by Wire (FANDOM user CasualChaos).
The flag was created by the coiner in the coining post, on the same date. The blue and red represent the different genders that one is fluid between. The bluish and reddish purples represent a mix of the two. The black represents being both separately.