Transmasc Demigirl is a term for when someone identifies as both transmasculine and a demigirl.
Transmasculine is an umbrella term for any trans person whose gender is masculine and/or who express themselves in a masculine way, and demigirl is someone who only partially but not wholly identifies as a girl or woman. A Transmasculine Demigirl could be a demigirl who prefers to have a masculine presentation, or whose other gender is masculine/male.
History
This Flag was created and uploaded by Tumblr user Mogai-Place on April 25, 2022 after an anonymous user requested it. It was uploaded along side Transfem Demiboy [1]