Eugender (pronounced "ev-gender" or "ef-gender") is any absolute, affirmative gender, it is opposed to antigender. It is a positive and certain gender experience, where one is certain that they are a given gender. It is also useful for some individuals to define a given pair of genders as an eugender-antigender pair within their gender experience.
Generally the eu- prefix is not necessary, as any gender without the anti- prefix can be assumed to be a eugender (in the same way numbers usually do not have to be specified as being positive), but it can be helpful to specify in some situations. For example, girl (or eugirl) would be the eugender of antigirl.
This term was coined by Tumblr user mogai-ringo on or before June 20th, 2018.
The flag was created by Tumblr user beyond-mogai-pride-flags on June 20th, 2018. It has no confirmed meaning.
The prefix "eu-" comes from the Greek word εὖ, meaning “well” or “true”.