A gender which is only partially connected to a gender (male, female, or non-binary). The other part is usually agender. Demigender people can be of any AGAB (assigned gender at birth).
“Sam is a boy in my history class.”
“Actually, she identifies as demigender — more specifically demigirl — now and uses she/they pronouns.”
One of the many JoJoGenders, Diogender is a gender identity of people who identify as Dio from JoJo's Bizarre Adventure so much, it became their gender. Diogender is also a type of nonbinary gender.
Fred: HeyTom, I've wanted to tell you that I am Diogender for a while now, I hope you accept me.
Tom: Yeah that's cool dude! Just let me know your pronouns!
Like a mix of being nonbinary and a boy or girl. Like a demigirl is a mix of nonbinary and a girl, demiboy is a mix of nonbinary and a boy. So it's like nonbinary but you kinda relate to one gender a bit more. Demigender is a real gender identity and you shouldn't say it's fake because it's a real thing.
Sarah: hey everyone I think I'm demigender
Everyone: what's that?
Sarah: it's like when a nonbinary person relates to one gender more than another, so I'm a demigirl so it's kinda like I'm a mix of a nonbinary person and a girl.