When you are just sitting there, with no one talking, and all of a sudden, a girl yells "OMG did I tell you??" and proceeds to tell the story.
You are sitting on the couch, with no one talking, just sitting there and watching TV. When all of a sudden, your friend (preferably a girl) Yells "OMG did I tell you??" And tells the story of the dream she had last night. That's a Jessiey..