Apollonian is a term used to describe an individual who presents themselves in a masculine way, but does not identify as a person of male/masculine gender.
This term is similar to but different from homproche. With homproche, gender non-conformity is an integral part of one's queer experience. However, this is not the case with apollonian.
The term can be used by anyone whose gender is not inherently masculine. The feminine counterpart is selian (formerly called artemesian), and the neutral counterpart is eosian.
History
The term and flag were created in a story pin by Pinterest user emozemo on July 19th, 2021. She also created the selian term and flag in the same post.[1]