Themisbigender is a term under the themisgender umbrella, which refers to an individual who feels like 1-49% bigender, but without the agender part like libragender individuals do.
History
This term was coined by Twitter user stickandst0n3s on December 28th, 2021.[1]
Flag
The flags were both created by Twitter user stickandst0n3s on December 28th, 2021. They have no confirmed meanings.