Apogender is a subset of agender in which one feels not only genderless but entirely removed from the concept of gender.
History
Apogender was coined on July 11, 2014 by queerspike, a since-deactivated Tumblr blog.<ref>http://genderdefinitions.tumblr.com/post/91400840744/sometimes-i-look-through-lists-of-prefixes-and-get (archive) (reblog)<ref>
Flag
The flag was created by Tumblr user pastelmemer on July 10, 2016.<ref>https://pride-color-schemes.tumblr.com/post/147207947805/apogender (archive)<ref>
Etymology
Apo is a Greek word that means away from.