In S1E9, Dean arrives to pick Rory up for the dance. He and Rory had agreed that he would honk when he arrived, but Emily insists that Rory wait until he comes to the door. Emily asks that Dean come inside, and Lorelai says, “Hey Dean. Meet my mother, Emily Post.”
Emily Post was a high society woman who wrote extensively about etiquette in the early twentieth century. She also wrote novels and travel books, but her most successful book was entitled “Etiquette in society, in Business, in Politics, and at Home,” published in 1922.