Endogender is a gender for when one's gender is fluid or fluctuating, but is always at least somewhat related to a given gender(s). For example, one could always be at least partially masculine (endoboy or marfluid), feminine (endogirl or venufluid), androgynous (endoandrogyne or eafluid), or non-binary/neutral genders (endononbinary or eafluid) whilst being fluid in some way.
History
The term was coined by a unknown user on an unknown date.
Flag
The endogender, endoboy, and endogirl flags were designed by nova-pride-flags on Tumblr on or before July 20th, 2016.[1]
The endoandrogyne flag was designed by Kalliepride on Tumblr.[2]
The alternate endogirl flag was designed by Pride-Flags on DeviantArt on August 14, 2015. The outer pinks represents femininity. The light lavender in the middle is a mix of pink, blue, and grey to represent those who shift to a partially feminine/masculine/genderless/non-binary feeling.
Etymology
Endogender is from the Latin root “endo” meaning “within”.[3]