Antigender

The antigender flag.

Antigender is a gender that can only be described as being the opposite of another gender. For instance, antinonbinary would be the opposite of non-binary. Antiboy would be the opposite of a boy. However, antiboy would not necessarily be female, because male and female are not opposites. Antigender may also be used by people who cannot narrow down their gender, but know they are definitely not a certain gender.

Antigender vs Ungender

Antigenders can be thought of as being on the opposite sides of neutrois than their gender counterparts, while ungenders are on the opposite sides of genderless than their gender counterparts.