Cinctaboy is a xenogender based on having many genders, yet still having a static masculine gender in the middle.
The feminine version of this term is cinctagirl, and the neutral version of this term is cinctaneu.
Coining of the term
The term cinctaboy was coined by Tumblr user pupyzu on March 1st, 2021.[1] The flag was created with the term. The meaning of the term is based off of -boy & "cincta", which means cincta in Latin.