Externusgender is an AGIN (agender in nature) gender that feels distanced from earth and its gender binary and alienated from other gender identities. It is based on and/or related to aliens and other extraterrestrial life forms.
Similar terms include aliengender.
History
Externusgender was coined on May 24, 2019 by Tumblr user sleepygender (formerly known as genderplush).[1]
Flag
The flag was created at the same time of coining. The meanings are currently unknown.