"The Big Sleep" is also a treasure trove of memorable lines, including:
Marlowe: "My, my, my. Such a lot of guns around town and so few brains."
Joe Brody: "Bet you think I'm dumb, huh?"
Marlowe: "Just average for a grafter."
Marlowe: "You wanna tell me now?"
Vivian: "Tell you what?"
"Marlowe: "What it is you're trying to find out. You know, it's a funny thing. You're trying to find out what your father hired me to find out, and I'm trying to find out why you want to find out."
Vivian: "You could go on forever, couldn't you?"
Eddie Mars: "Convenient, the door being open when you didn't have a key, eh?"
Marlowe: "Yeah, wasn't it. By the way, how'd you happen to have one?"
Mars: "Is that any of your business?"
Marlowe: "I could make it my business."
Mars: "I could make your business mine."
Marlowe: "You wouldn't like it. The pay's too small."
Marlowe: "You know what he'll do when he comes back? Beat my teeth out, then kick me in the stomach for mumbling."
Vivian: "I don't like your manners."
Marlowe: "I'm not crazy about yours either. I didn't ask to see you. I don't mind if you don't like my manners, I don't like them myself. They are pretty bad. I grieve over them on long winter evenings. I don't mind your ritzing me and drinking your lunch out of a bottle. But don't waste your time trying to cross-examine me."
Agnes: "Is Harry there?"
Marlowe: "Yeah, yeah, he's here."
Agnes: "Put him on, will you?"
Marlowe: "He can't talk to you."
Marlowe: "Because he's dead."