I’m not sure when this supposed joke began, but from what I found[1] with a quick search “genderfluid” was used at least as early as 1994 and not as a joke. The

I’m not sure when this supposed joke began, but from what I found[1] with a quick search “genderfluid” was used at least as early as 1994 and not as a joke. The same source cites an appearance in Urban Dictionary in 2007, but the entry doesn’t appear anymore and the Wayback link is currently returning 503 errors for me. 1: https://lgbtqia.fandom.com/wiki/Genderfluid#Etymology https://lgbtqia.fandom.com/wiki/Genderfluid#Etymology