enby means in slang: A person who is not male or female but identifies. They were either forced to change their gender, or they had it removed from them. You can misgender me an enby, and I’ll come to you. (in Slang Dictionary, added by Godofredo González)
What else does enby mean?
EN’bee From “NB” which is non-binary. They don’t identify with either the male or feminine genders and prefer to use “they” instead of a pronoun. These people should not be considered men or women. You can identify yourself as enbies by being genderqueer or agender, pangender or having any other gender identity than binary. (in Slang Dictionary, added by Jargoon)