Neither

Neither is a gender term used by those who refuse to define themselves under one term. It is not necessarily agender, gendervoid, neutrois, or abinary. One may or may not have a gender. It is an example of an unlabel.

History and Flag
Neither was first defined as it is now and a flag was created for it by Tumblr user beyond-mogai-pride-flags on June 26, 2018.

In the upper left-hand corner of the flag is a Mars symbol and a Venus symbol overlapping. Where they overlap has an X drawn through it. The both flag has a similar design.