Externusgender

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 and Flag
The term and flag were created on May 24, 2019 by Tumblr user Sleepygender (formerly known as Genderplush). The flag's meanings are currently unknown.