Rosboy is term for a feminine boy or man. They consider themself a boy or have a connection to manhood, but they also have a connection to femininity, either in their gender or their gender expression. It is an umbrella term for all identities that involve being both a boy and feminine, and includes feminine aligned men and men who present femininely.
History
The term rosboy and the flag were created by Tumblr user Neopronouns on July 17, 2020.[1]