Postgender

Postgender is a feeling that one’s identity has been heavily influenced and shaped by a gender that one no longer experiences. For example, a postboy no longer feels that their gender identity is male but still feels a strong connection to masculinity or has been shaped by it in some way.

Not to be confused with postgenderism.

History
The term was coin on or before June 24, 2014 by Tumblr user Lamb777 (formerly Baaphomett), along with pregender.

Flag
The postgender, postboy and postgirl flags were designed by the-dawn-prayer on Tumblr.