It's a site completely dedicated to conversations overheard in New York City. It's so true in fact that while I was reading it and laughing my butt off, I overheard a girl in my office say, "No one is going to steal my lunch or spandex....geez!"
This site is awesome - http://www.overheardinnewyork.com/
"I'm an evolution science guy. If you want to believe in that nonsense then you gotta admit your god is an underachiever with a good publicist."
Another good one: "Yeah, I would never fart in her face, that's disrespectful."