Hypergender is a gender when one feels like their gender is fully one thing, but then having more of that gender added on top of it. They may feel a given gender more strongly than most people of that gender. For example, if binary men are 100% male, then a hyperboy may feel 150% male.
It could be considered the opposite of demigender. For example, if a demigirl feels less than 100% girl, a hypergirl would feel more than 100% girl.