You know those people who just don't know how to act like a boy or girl? It doesn't mean gay but what it does mean is. You, either don't know how to be feminine or masculine... or you're just uncomfortable doing so.
Girl- "Oooh honey, prom is next month! What you gonna wear and who you gonna take?"
Girl- "Well don't you like any boys here?"
Zerogender- "Some of them.... but uhhhh,"
Girl- "It's almost like you don't know how to be a girl!"