Genderfluff, also known as fluffgender, is an aesthetigender that is light, soft and fluffy or related to fluffyness or fluffy things. It can make one feel warm and fuzzy inside, it could also mean having an attachment to pastel femininity as well as fluffyness. Fluffyness includes fluffy pillows or plushies as well.
The newest version of this term was made with age regressors in mind, but can definitely be used by anyone. One can also add a suffix if they feel an attachment to another gender, such as fluffboy, fluffgirl, fluffnonbinary, fluffandrogyne, and so on.
Genderfluff seems to have first been used on August 27, 2014 by Tumblr user Hollifo. It was next coined on July 16, 2016 by Tumblr user Glitchprincette. The most recent re-coining was on December 16, 2018 by Tumblr user Twink-Flags. Twink-Flags' definition is the used most often.
The flag was created on December 16, 2018 by Tumblr user Twink-Flags.