Negabinary (gender): genders that can only be defined as opposed / contrary to gender binary base existing within your culture; having both negative-binary genders; the binary gender antithesis, polyantigender of male and female; multibinary negatrois feeling gender negativity.

Binary negativity could be feeling lethargic about binaryness, not necessarily gender pessimism for example. Note that some negabinaries aren’t essentially agender since they can also be antiagender (falling on negative-agender or agender negatroisness). 

See also: antibinary, abinary, antiandrogyne and unbinary. ~ ap