The Bigendersum Flag
Bigendersum is a gender in which one has two distinct genders that they are fluid between. One can be one gender or both, but never the other or a mix. Both genders, even when the individual is both, are separate. The one gender is constant while the other gender is added and subtracted from it.
An example of a bigendersum individual would be someone who is fluid between man and non-binary. The individual can be man or both, but never non-binary or a mix.
History
This term was coined on October 5, 2021 by Wire(FANDOM user CasualChaos).[1]