An umbrella term which covers any gender labeled or defined after the year 2000 [1]. The prefix "neo" means "new."

Some examples are librafluid (mostly agender, but fluctuating with other genders slightly) and demigender (identifying only somewhat as one gender, and usually partly agender as well but not always!).

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Sources

[1] Various. 2020. Genderwiki: Neogender. Link to article. Accessed On: 10/18/23.