Barry: Yeah, it was intense. She gave him extra au jus on the house.
Person 2: "Where is she?"
Person 1: "Great, now she's giving me the French Dip."
Person 2 "lol n00b."
Then a girl goes to the bathroom, and without really looking or thinking, sits down on the open toilet seat.
Since the seat was left up, she falls in. Her labia "dip" into the dirty toilet water, and as they do, she exclaims, "Au Jus serious!?!"
Thus: the french dip