Centrigender is the experience of being centered between or in the middle of multiple genders. An example would be androgyne, which is a centrigender between male and female. However, one could have a centigender in between any two genders. One could also have a centigender in between more than two genders. It could be considered a monogender, or a multigender depending on how one personally views their gender.
It is unknown who coined the term and when, although it was coined on or before January 13th, 2019.
The flag was created by Tumblr user imoga-pride on January 13th, 2019. It has no confirmed meaning.