Slimegender is a form of fluidflux/genderfluid where all of one's genders feel like differently gendered slimes mixing together, with different combinations and amounts coming to the surface at different times.
History
Slimegender was coined by now deactivated tumblr user fishieprinxe sometime on or before July 30, 2016. The first two flags were designed by a user named autistic-italy, and the third flag was designed by Mod Tath of Pride-Flags on DeviantArt with the help of an anonymous user. The fourth flag was made by FANDOM user Astarte Snow and the colours were based on those from autistic-italy's flags.
Resources
Slimegender (1) by Pride-Flags on DeviantArt
https://www.deviantart.com/pride-flags/art/Slimegender-2-624843935
https://www.deviantart.com/pride-flags/art/Slimegender-3-665417825