Reddit had a great thread recently: Which famous quotes would take on a totally different meaning if said by someone else?
Some of the good ones:
"I'm selfish, impatient and a little insecure. I make mistakes, I am out of control and at times hard to handle. But if you can't handle me at my worst, then you sure as hell don't deserve me at my best."
"I did not have sexual relations with that woman."
"Here's looking at you, kid."
"I don't know who you are. I don't know what you want. If you are looking for ransom, I can tell you I don't have money. But what I do have are a very particular set of skills; skills I have acquired over a very long career. Skills that make me a nightmare for people like you."
-Carly Rae Jepsen