To be told off or rejected by a girl/guy before you can even ask.
Bobby: Dude Marie told me not to even dream of asking her to prom right before I could ask.
Jason: Wow, prejected man, first case of prejection I've ever seen.
The act of rejecting something, before the concept has even been posed, especially when pertaining to a relationship or date
Guy: So... I was wondering if--
Girl: No, I won't go out with you
When someone rejects you prior to you showing interest, just in case you might like them/ Someone mentioning that they are taken or busy at length when you're having an unrelated conversation.
"What's everyone doing tonight?"
"Oh my GIRLFRIEND and I might have plans, I'm not sure"
"now that's some prejection"
Someone letting you down easy when you weren't ever interested in the first place.