Walsh: Forget it, Jake. It’s Chinatown.
Brian: Look, you’ve got it all wrong! You don’t need to follow me, You don’t need to follow anybody! You’ve got to think for your selves! You’re all individuals!
The Crowd: Yes! We’re all individuals!
Brian: You’re all different!
The Crowd: Yes, we are all different!
Man in crowd: I’m not…
“Fear is our most primal emotion.”
Vernee Watson as the ER nurse in the Big Bang Theory episode with Howard and the robot hand.
(Over the PA) I need an orderly with a wheelchair. We have a robot hand grasping a man’s penis.
Howard: Couldn’t you be a little more discreet?
Nurse: I’m sorry. We don’t have a code for “robot hand grasping a man’s penis”.
Also her response to Howard when she asks where the rest of the robot is, and Howard tells her he only built the hand. “Because that’s all you needed.”
My favorite is also from Raising Arizona.
Son, you got a panty on your head.
Oh, yeah. So many good ones from non-cast members. Going from memory here:
Jim Parsons (Sheldon): You didn’t check.
Yeardly Smith: I didn’t have to.
I like Brad Pitt in True Romance:
The clerk at the DMV when Sheldon is applying for a driver’s license:
“Look at that sign up there. Does it say I give a damn?”
That was Octavia Spencer.
Shortly after that:
Don’t make me climb over this counter!
I did not particularly care for Brad Pitt until I saw True Romance. I was instantly converted because I loved the character and Pitt’s performance. 
“He chose… poorly…”
Smell ice, can you? Bleedin’ Christ!
Again at the beginning of the new Maverick movie. Cruise blows up his hypersonic plane and ejects, and is shown walking into a remote diner in his high altitude flight suit. Kid looking at him with jaw hanging open. Cruse: “Where am I?” Kid: “Earth.”
Beaten to it.
That and:
“Mawage. Mawage is wot bwings us togever today. Mawage, that bwessed awangment, that dweam wifin a dweam…”
Psst. Post #23.
Whatever movie this line is from:
The exquisite punchline from Edie McClurg in Planes, Trains, and Automobiles
Richard Brooks portrayed Jubal Early for one episode of Firefly and left such a huge impression, my wife and I still quote it today:
So many quotes, his entire part is one large quotable part.
[to a doctor] “You oughta be shot. Or stabbed, lose a leg. To be a surgeon, you know? Know what kind of pain you’re dealing with. They make psychiatrists get psychoanalyzed before they can get certified, but they don’t make a surgeon get cut on. That seem right to you?”
This exchange:
Simon : Are you Alliance?
Jubal Early : Am I a lion?
Simon : What?
Jubal Early : I don’t think of myself as a lion. You might as well though, I have a mighty roar.
Simon : I said “Alliance.”
Jubal Early : Oh, I thought…
Simon : No, I was…
Jubal Early : That’s weird.
Alec Baldwin guest starring on Las Vegas, investigating a painting stolen from the casino run by James Caan character Ed Deline.
Baldwin character (with Deline, “interviewing” a potential suspect:
“Max Krasnow, you derivative hack. I can paint better pictures with my johnson”.
" Max here, when he’s not making paintings that hang in the Holiday Inn in Pahrump, is an art thief".
Krasnow: “Hey, there’s a market for this stuff”.
“I SHAVED OFF MY BEARD FOR YOU, DEVIL-WOMAN!” - Mal’s pal Monty in Firefly.