Equigender is a term for multigender individuals whose genders are all in equal amounts. An example would be a bigender individual who is 50% one gender and 50% another gender, or a trigender individual who is 1/3 one gender, 1/3 another gender, and 1/3 another gender.
Equigender was coined originally as a troll term by a Reddit user, but on July 30th, 2016 but it was reclaimed by Tumblr user pride-color-schemes.
The equigender flags were made by pride-color-schemes on July 30th, 2016. The colors are the same as the polygender flag, and the scale and equal symbol symbolize equal amounts.