facebook snipe
You post something stupid or mean just to make someone else say something stupid or mean back, then you delete your comment and laugh while they're left looking like a fool.
You post 'You're ugly and you know it' just to get them to say something back, then you delete it and laugh.
You say 'You're a failure' to your crush, then you take it down and walk away like you're a genius.
You write 'You're the worst' on their post, then you erase it and they're stuck with their reply.