Bigender

Definitions and Usage
Bigender describes having two genders, either simultaneously or in flux. Although it is often assumed to be the two binary genders, but that's not always the case. Bigender people may use the term nonbinary to describe themselves.

Subgenders
Demigenders (like demiguy or demigirl) often overlap with bigender, as well as genderfluid. Bigenderflux is a specific label describing a bigender experience that is also fluid, but it is less common. Bigender can encompass any two genders, really.

Flags
The two flags use the typical pink, blue, and purple imagery: the colors associated with the binary and its combination. White here represents agender. The yellow in the second, newer flag represents nonbinary genders.