Lady Violet: "You are quite wonderful the way you see room for improvement wherever you look. I never knew such reforming zeal."
Lady Isobel Crawley: "I take that as a compliment."
Lady Violet: "I must have said it wrong."
Lady Cora: "Are we to be friends then?"
Lady Violet: "We are allies, my dear, which can be a good deal more effective."
Lady Violet: "Well give him a date for when Mary is out of mourning. No one wants to kiss a girl in black."
Lady Violet: "Your quarrel is with my daughter, Rosamund, and not with me. So put that in your pipe and smoke it."
Lady Cora: "I might send Mary over to visit my aunt. She could get to know New York."
Lady Violet: "Oh, I don't think things are quite that desperate."
Lady Violet: "Why would you want to go to a real school? You're not a doctor's daughter."
Sybil: "Nobody learns anything from a governess, apart from French and how to curtsy."
Lady Violet: "What else do you need? Are you thinking of a career in banking?"
Lady Cora: "Things are different in America."
Lady Violet: "I know. They live in wigwams."
And, the general favorite:
"What is a weekend?"