Negagender is a Neurogender in which someone's gender is defined/influenced by the negative symptoms of schizophrenia, negative symptoms referring to traits psychotic people might have that suggests the absence of a "normal" trait, such as flat affect, anhedonia, etc.
History
Negagender was coined on or around November 12, 2014, by tumblr user gaycactusprince.[1]
Flag
The flag was created by Deviantart user Pride-Flags on June 12, 2017.[2] The blue stripes represent taking life away from the design. The top three stripes represent subtracted or added traits, while the bottom two represent normal traits.