The original moderator of the Aporagender blog on tumblr coined the word aporagender in 2014. The person who coined the word "aporagender" made it as an alternative to aliagender, due to concerns that aliagender might be "racist or appropriative."
Hyaenahart designed the aporagender pride flag, which is shown at right. "Blue & Pink have been put on either end of the flag to show that you feel your gender is 'away' from these two colours, stereotyped as blue being masculine and pink being feminine. Purple to represent as feeling between male and female. Yellow to represent how the gender is nothing like being female, male or both, but is also placed close enough to blue, purple and pink to show that it’s still connected strongly to some sort of specific gender. Yellow also represents how it’s a non-binary identity."
As an umbrella term
"Aporagender is under the nonbinary umbrella, but is a more specific label" than nonbinary. Aporagender is also an umbrella term for some nonbinary identities. As an umbrella term, aporagender includes some kinds of nonbinary and genderqueer people, but "doesn’t include people who are agender, between male and female, or binary trans people." Therefore, aporagender is a more specific umbrella term than "genderqueer," because when genderqueer is used as an umbrella term, it sometimes includes binary trans people and gender nonconforming binary cisgender people. "Aporagender is pretty much everything that isn’t male, female, agender, or between male and female."
Difference from other genders
Aporagender isn't the same thing as androgyny, because androgyny can mean a mix of female and male, or in between female and male, whereas aporagender "is any nonbinary identification that isn’t male, female, or anything in between while still having a strong sense of gender."
Some people who call their gender neutrois define neutrois as having no inner sense of their gender (genderless), whereas other neutrois people use it to mean having a gender that is not female, not male, not between, but neutral. In the former sense, aporagender isn't a synonym for neutrois, because aporagender people have an inner sense of their gender. In the latter sense, aporagender can be a synonym for neutrois, "but as not everyone uses the same definition [of neutrois], aporagender is still needed for some people." Since some neutrois people use neutrois to mean that they have no inner sense of gender, aporagender is not a synonym of that, because aporagender people have a sense of gender. In that case, in its most specific sense, aporagender is a synonym with neutrois, if neutrois is used in its definition that means "not female, not male, not between female or male." That said, neutrois has many definitions, so aporagender is only a synonym for one of these.