The term neutranullfluid was coined by Tumblr user nonbiarrow on 17/04/2021, as well as its original flag.<ref>{{Archive|siteSite=web|URL=https://nonbiarrow.tumblr.com/post/648755386038484993/neutranull-neutranullfluid-neutranull-a}}</ref> However, the current flag was created on 09/05/2021 by the same user.<ref>{{Archive|siteSite=web|URL=https://nonbiarrow.tumblr.com/post/650735652241031169/nullfluidgenders-virnullfluid-someone-who-is}}</ref>