Virtually every line of Casablanca is quotable! 
Office Space, of course.
Yeeeeeaaaaaa… I’m going to go ahead and ask you to put those new cover sheets on your TPS reports.
“PC Load Letter”. What the fuck is that supposed to mean?
We’re going to federal pound-me-in-the-ass prison!
My favorite from “In Bruges”
"You’re an inanimate fuckin’ object!
Tombstone is my fave.
Listen, Mr. Kansas Law Dog. Law don’t go around here. Savvy?
Come on boys. We don’t want any trouble in here. Not in any language.
I’m your huckleberry…
I swear, it’s like I’m playin’ cards with my brother’s kids or somethin’. You nerve-wrackin’ sons-a-bitches
You gonna do somethin’? Or are you just gonna stand there and bleed?
You skin that smoke wagon and we’ll see what happens!
Forgive me if I don’t shake hands.
Why Johnny Tyler! The madcap!
You run your mouth awful reckless for a man that don’t go heels.
That’s not what he said, you ignorant wretch.
In the time it takes us to play 18, we no doubt recite the entire movie (not in order really). How can you not?
The Cinderella story. He’s on the final hole. 455 yards away… looks like he’s gonna hit a two iron.
*I’ve sentenced boys younger than you to the gas chamber. Didn’t want to do it. I felt I owed it to them. *
He’s down by the creek, walkin’ on water.
He reminds me of me. Now I know I hate him.
You’re not wearing a bustle. How rude.
Oh, Johnny. I forgot you were there. You may go.
I’ve got two guns, one for each of ya.
Ah, Val Kilmer’s Doc Holiday was a thing to behold.
I’m surprised it took twenty posts to get to Aliens!
“Hey Vasquez, you ever been mistaken for a man?”
“Nah, have you?”
“We’re fucked… we’re DOOMED! Game over man, game over!”
(I love how in Hudson’s world being doomed is worse than being fucked)
Apone’s entire speech about how a day in the Corps is like a day on the farm.
And the classic:
“GET AWAY FROM HER YOU BITCH!”
Yes it was.Shame he didn’t get an Oscar…not even nominated.
Billy Bob Thorton’s Johnny Tyler was also fantastic.
Monty Python and the Holy Grail is by far the movie I’ve heard quoted the most often and by the biggest range of people, too. Nothing else comes anywhere near that.
Dude you forgot.
If things go well I might be showing her my O-face. “Oh… Oh… Oh!” You know what I’m talkin’ about. “Oh!”
I uh, I don’t like my job, and, uh, I don’t think I’m gonna go anymore.
You know, I’ve never really liked paying bills. I don’t think I’m gonna do that, either.
So I was sitting in my cubicle today, and I realized, ever since I started working, every single day of my life has been worse than the day before it. So that means that every single day that you see me, that’s on the worst day of my life.
The ratio of people to cake is too big
The Wizard of Oz
“Toto, I don’t think we’re in Kansas anymore.”
“I’ll get you my pretty - and your little dog too!”
“Pay no attention to the man behind the curtain!”
“Follow the yellow brick road.”
“Somewhere, over the rainbow…”
“Fly, my pretties, fly!”
IMHO, TWoO is the most referenced movie ever made and might be the most widely referenced work of American art ever.
Fletch is up there as well.
“Dr. Rosenrosen”.
“Doesn’t mean I want her sitting next to me, does it?”
“I’m sorry, who are you again?”
“I’m Frieda’s boss.”
“Who’s Frieda?”
“My secretary.”
“If you shoot me, you’re liable to lose a lot of those humanitarian awards.”
“I’ll have a Bloody Mary and a steak sandwich and… a steak sandwich, please.”
“I’m afraid there is someone sitting next to you.”
“Oh, for… God dawd dawd! Who is it, Mr. Sinlindin?”
“Got a gun, creep?”
“Shamu’s got one, borrow his.”
“What have we here?”
“That’s my dick.”
“Can’t keep me here, chief.”
“Maybe I’m not going to keep you in here. Maybe I’m going to blow your brains out.”
“Well, now, I’m no lawyer, but I do believe that’s a violation of my rights.”
“Thank god, the… police.”
“Now, how long have you had these pains, Mr. Barber?”
“No, that’s “Babar”.”
“Two B’s?”
“One B. B-A-B-A-R.”
“That’s two.”
“Yeah, but not right next to each other. I thought that’s what you meant.”
“Arnold Babar. Isn’t there a children’s book about an elephant named Babar?”
“I don’t know. I don’t have any.”
“No children?”
“No, elephant books.”
“John Cocktoastone.”
Yep, Anchorman is just one quote after another.
I challenge anyone to find a part of that movie that isn’t quotable!
WHAMMY!
The Godfather:
“Make him an offer he can’t refuse.”
“Leave the gun. Take the cannoli.”
“Don’t ask me about my business, Kay.”
“Fredo, you’re my older brother, and I love you. But don’t ever take sides with anyone against the Family again. Ever.”
“It’s a Sicilian message. It means Luca Brasi sleeps with the fishes.”
“Tattaglia is a pimp. He never could have outfought Santino. But I didn’t know until this day that it was Barzini all along.”
Dr. Strangelove:
“Gentlemen, you can’t fight in here! This is the War Room.”
"One of our base commanders, he had a sort of… well, he went a little funny in the head… you know… just a little… funny. And, ah… he went and did a silly thing… "
“I can no longer sit back and allow Communist infiltration, Communist indoctrination, Communist subversion and the international Communist conspiracy to sap and impurify all of our precious bodily fluids…”
“You’re gonna have to answer to the Coca-Cola company.”
“Shoot, a fella’ could have a pretty good weekend in Vegas with all that stuff.”
“Animals will be bred AND SLAUGHTERED!”
“Mein Führer! I can walk!”
I don’t think anything comes close to The Holy Grail or Life of Brian. There are plenty of movies with some highly recognisable quotes, but there are quite literally few lines from the Monty Python movies that are not funny and quotable.
Frankly, many of the quotes in here may be personal favourites or favourites among a particular clique, but I don’t think most people would have heard of them at all, and even then they probably represent a few percent of the lines in the movie from which they are quoted.
It’s not really a fair competition: most movies which have good dialog (ie that aren’t pure action movies) have considerable plot, and that plot has at least some small degree of realism which means it has to have a lot of dialog that does nothing but move the plot along.
Sketch movies like the Python films can just be a series of comedy skits strung togther, so they get an unfair advantage in this thread. Airplane is another example.
Airplane!, Anchorman, Office Space among others.
However, for the past couple years, a friend and I have been quoting American Psycho almost non-stop. At one point, we were able to recite Patrick Bateman’s review of Huey Lewis and The News.
I came to say Groundhog Day… again.
This is a generational thing of course, but Swingers I’d put up there, maybe just a tad behind Pulp Fiction.
“Is that the chick with all the shit in her face?”
“No, that’s Trudy – that’s my wife.”
Kills me!
Is this a kissing book?
As you wish.
Murdered by pirates is good.
You were not hired for your brains, you hippopotamic land mass.
You keep using that word. I do not think it means what you think it means.
My name is Inigo Montoya. You killed my father. Prepare to die.
I am not left-handed.
I’m not left-handed, either.
Get used to disappointment.
Rest well, and dream of large women.
You’ve heard of Plato, Aristotle, Socrates? Yes. Morons.
You fell prey to one of the classic blunders; the most famous of which is ‘never get involved in a land war in Asia’. But only slightly less famous is this: never go in against a Sicilian when death is on the line!
I’ll most likely kill you in the morning.
What about the R.O.U.S.es? Rodents of unusual size? I don’t think they exist.
We are men of action; lies do not become us.
Thank you for bringing up such a painful memory. While you’re at it, why don’t you give me a nice paper cut and pour lemon juice on it.
I’ll call the brute squad. I’m on the brute squad. You are the brute squad.
Oh, look who knows so much.
Liar. Liar! Li-aarrrrr!
Have fun storming the castle.
Let me 'splain. No, there is no time, let me sum up.
My brains, his steel, and your strength against sixty men and you think a little head jiggle is supposed to make me happy, hmm?
Mawwiage.
I want my father back, you son of a bitch!
There’s a shortage of perfect breasts in this world, it would be a pity to damage yours.
To the pain!
C’mon, admit it, even after that list, you’re thinking of great lines that I left out, aren’t you?
I think we have a winner.
Oh man, how did I forget Tombstone! Good call.
*How 'bout you, lunger? You retired?
Not me <cough, cough>. I’m in my prime!
*
My favorite: “In a child’s ability to master the multiplication table, there is more holiness than all your shouted hosannas and holy holies. An idea is more important that a monument and the advancement of Man’s knowledge more miraculous than all the sticks turned to snakes and the parting of the waters.”
Spinal Tap goes up to eleven etc.