Femboygender is when one has a main masculine gender, however they feel as though feminine presentation and concepts best define one or all of their genders. They may consider this a xenogender, as they may use femboys as a metaphor to describe how their gender feels, rather than what their gender presentation is.
It falls under the rosboy umbrella, as rosboy is any masculine-aligned person with a connection to femininity.
History
Flag
The flag appears to have been coined on January 5th of 2021 by Luna4220. It is unknown if it has a meaning.
An alternate flag was created by Wiki user uRnAnSaNdI on February 28th 2021 based on the original flag.