neurogender in which someone's gender is defined/influenced by positive symptoms of schizophrenia. Positive symptoms are symptoms non-psychotic people don't have, but psychotic people might (hallucinations, delusions, etc.).
Posigender was coined on or around November 12, 2014, by tumblr user cactusprincex.
The Posigender flag was created on January 19, 2017 by Deviantart user Pride-Flags. The reds symbolise adding life to the design, while the bottom two stripes represent normal traits while the top three represent subtracted traits.