Xenboy

Not to be confused with xenoboy or enboy Xenboy is a term for those who identify as xenogender, enby, and a boy. This can include, but is not limited to multigender, gendervast individuals, genderfluid and genderflux individuals, solarian xenine people, etc. One does not have to fully identify as xenine, nonbinary, and a boy all at once; partial identification with all 3 is a defining aspect.

Similar terms include Enboy, Xenoboy, and Xenby.

Flags and Symbols
Variant-Archive on Tumblr is the one who originally coined the term 'Xenboy.' The first appearance of the flag is a submission on imogai-pride on Tumblr. There are no easily availible sources excplaining the meaning of the flag.

An alternate flag was made by u/johnnynotjohnnie on Reddit, combining the Enboy and Xenoboy flags.

Resources
1. https://imoga-pride.tumblr.com/post/625391548644917248/xenboyxenbyboyxenenboy-is-a-term-that-combines/