Could it be:
Evelyn : Mulwray Hollis seems to think you're an innocent man.
Jake Gittes : Well, I've been accused of a lot of things before, Mrs. Mulwray, but never that.
OR:
Escobar (Perry Lopez) : Isn't that your phone number?
Jake Gittes : Is it? I forget. I don't call myself that often.
I liked :
Loach (Dick Bakalyan) : What happened to your nose, Gittes? Somebody slammed a bedroom window on it?
Jake Gittes : Nope. Your wife got excited. She crossed her legs a little too quick. You understand what I mean, pal?
Others at :
http://home.earthlink.net/~ajdlro/chinatown.html