An adjective that describes a potential love interest that you really think you're interested in and would do your best to get with them. After much consideration maybe a few months later you realize they weren't worth the effort of being with them. Thus making them a passover, as you have moved on.
I really like him.
You sure about that?
Yes, I am.
U just think he is a passover guy.
Most of the girls you have dated are passover girls.
Yeah, not worth my effort.