Ex-zone
When someone reminds you of your ex or you think someone could potentially become an ex and won't even give that someone a chance.
Friend: "You should ask him out."
Me: "Nah, he reminds me of my ex."
Friend: "So, he's ex-zoned?"
Me: "Yep."
Me: "Nah, he reminds me of my ex."
Friend: "So, he's ex-zoned?"
Me: "Yep."