The opposite of a boy, not a
girl. As the opposite of a
girl is an anti-boy.
Gender is on a spectrum, and isn't limited to 2 genders. Of which in the spectrum an anti-boy is the polar opposite of a
girl. Such as how a demi-boy is the opposite of a guy.
Dude, I was ERPing with this
girl and it turns out they'
re an
anti-boy, totally ruined my drive.