Favorite movie lines

"Write a book about what!?"

-The Wrong Cops-

From Unforgiven, "I ain't like that no more, Ned. I ain't no crazy killin' fool."

The Empire Strikes Back

Han Solo - It's not my fault!

Jack: "I have to pull my boots up real high, you know."
Eric: "What do you mean?"
Jack: "Because the bullshit is getting thick. There are no piranha in there."
Eric: "I'm not kidding; there are piranha in there."
Jack: "Piranha....South America; they can't live here."
.
.
.
Jack walks into the muddy river and is attacked by piranha. He runs on top of the water to get out of the river.

1982, The Toy (Richard Pryor, Jackie Gleason, et al).

Runner up.... "Hey, you guys!" Sloth, The Goonies.

Does it count if it's from a real life historical letter? I'd love to drop this in a movie.

Gentlemen,
You have undertaken to cheat me. I won't sue you, for the law is too slow. I'll ruin you.
Yours truly,
Cornelius Vanderbilt.

"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 drinking your lunch out of a bottle. But don't waste your time trying to cross-examine me."

- The Big Sleep -

In Pope of Greenwich Village, Jack Kehoe, listening to his mother (geraldine page) cough and wheeze, tells her, "At least go to the filters, Ma. And those highballs aren't doing you any good either."

Geraldine: "A little whiskey, Walter (cough, wheeze) is good for the system."

Turned out she would outlive her son.

“You know, there’s a million fine looking women in the world, dude. But they don’t all bring you lasagna at work. Most of ’em just cheat on you.” * – Silent Bob - Clerks

"We'll jump"
"Like hell we will"
"They'll just have to go back the same way they came"
"get away from me"
"Would you make a jump like that if you didn't have to?"
"I have to but I'm not gonna"
"What's the matter with you?"
"I can't swim!"
"Why you crazy, the fall'll probably kill ya!"

Butch Cassidy and the Sundance Kid

There are many others in the movie, but this one stands out.

"Take your stinking paws off me, you damn dirty ape!"

I like to use that one on dates.