facebook limbo
When you don't want to accept a friend request because it's rude, but you also don't want to reject it. So you just let it sit there like a middle finger from the future.
I saw my old nemesis sent me a friend request. I didn't accept, didn't reject. I let it rot in my notifications.
My teacher sent me a friend request. I left it in limbo because I didn't want to be called 'Mr. Smith' in class.
My crush asked me to be friends. I left it in limbo because I didn't want to look like a total dork.