A fork of Rural Dictionary
A relationship, with a person you don't realize is your sibling.
Friend: Hey isn't that your girlfriend? Bro: No... Friend: What, she saw your tiny dick and said no!? Bro: More like we learned we were skywalking.... Friend: ... That's your sister?... WAIT YOU ALMOST FUCKED YOUR SISTER!?!!?!? Bro: . . . . . .