Monday Rule
The rule stipulating that no one in your circle of friends with whom you typically discuss Game of Thrones episodes in can speak of, or even allude to, the latest episode until Monday. This is critical in order for the episode to be posted online for those without HBO.
"Bro, that last episode of Game of Thrones was nuts. So many people died."
"Shut up! Monday Rule!"
"Shut up! Monday Rule!"