Antigender is a category of "Genders that can only be defined as the opposite of an existing gender. For instance: antiboy would be the opposite of a boy. antigirl would be the opposite of a girl.". An antigirl would feel the opposite of female, but not necessarily feel male.
Similarly, ungender is a category of genders that are "Not without, but a negative; an unboy would be the negative of a boy and an ungirl would be the negative of a girl." Antigenders are under the umbrellas of nonbinary and transgender identities, as well as possibly xenogender.
The opposite of a boy, but not a girl.
The opposite of a girl, but not a boy.
The opposite of no gender but neither boy or girl. Similar to aporagender.
a gender that changes between one gender and it's antigender. the word gender can be replaced be the gender involved, for example, cendboy is when you flip between boy and antiboy. A kind of genderfluid identity.
A gender that the opposite of their assigned at birth sex but not the other binary gender.
This includes antiboy, antigirl, and antiagender. These meanings were coined along with the flags by freaky0.0.
The black-light grey fade represents the discovery and acceptance of this label (personally or publicly).
The dark blue/pink/green represents the non-connection with masculine/feminine/agender.
The light blue/pink/yellow represents a connection with masculine/feminine/non-binary, but they are lightened to represent the variation in that connection (connection, no connection, or anywhere in between/outside).
The meanings for the original antigender flags' colors are unknown.