Blanknonbinary

A non-binary person who cannot explain their non-binaryness any further than being a blank space. Also can be called blankenby.

The fluid equivalent is blanknonbinaryfluid, the gender neutral equivalent is neutrablank, the androgynous equivalent is blankandrogyne and the xenogender equivalent is xenoblank.

History
The term was coined by tumblr user nonbiarrow (aka reddit user u/elhazelenby) on April 20th 2021, along with its flag.

Flag
The flag shows the genderblank flag but with an extra yellow field on the top half of the flag, representing being non-binary.