Movie lines that you borrow in real life.

[GloomCookie]

Anytime one of my coworkers mildly inconveniences me. "You're killing me, Smalls." -The Sandlot

That's the only one I use on a regular basis. Others are highly dependent on the situation.

[Pink Duct Tape]

"I love my turtle." -Grandma's Boy

Much the way the above uses, "You're killing me Smalls," I use, "Settle down Beavis." From Beavis and Butthead Do America.

[Oniya]

I don't know if this made it into the movie, but from HHGG:

'Dark.  No light.  Dark.'  (When someone has said something very obvious, or when there's been a power outage.)

Sometimes, depending on the crowd, I follow it up with 'Oh my, you've just fallen down a fifty foot well.  Are you alright?'

[Pink Duct Tape]

Dark. lol.

I didn't think about it until earlier, when I did it, but I use, "Catch you on the flip side" too, from Boondock Saints.

[LostInTheMist]

My 2nd best friend/college roommate and I use "you will perish in flame" from Ghotsbusters as a rushed hello/goodbye. Any time one of us is in a rush going to something that the other is not. Whether class, a date, a social thing, whatever. *Walk into the room* "You will perish in flame!" *Walk out of the room.*

[Silvered Sutures]

My general response to people doing something that will go obviously poorly;

Rocky IV

“If he dies, he dies.”
Ivan Drago (Dolph Lundgren)

[Anakiel]

I use a lot these two lines from Star Wars: The Phantom Menace

"A surprise to be sure, but a welcomed one."

"The ability to speak does not make you intelligent."

[Inkidu]

I use a lot these two lines from Star Wars: The Phantom Menace

"A surprise to be sure, but a welcomed one."

"The ability to speak does not make you intelligent."

I've used some variation of "There's always a bigger fish."

[Shekinah]

Those of Scar from the lion king:

I'm surrounded by idiots

[Oniya]

A common bit of dialogue in the Oni-house:

'I've been thinking...'
'A dangerous pastime.'
'I know.'

[Muse]

Brilliant, Oniya.  I use that one whenever I can. Usually when one of my friends says the first like, I  interject with the second.  It's quite pleasant how often they manage to smoothly reply with the third and  keep going with their conversation.  

[LanaN]

“It’s a bold move Cotton, let’s see if it pays off.”

- Dodgeball: A True Underdog Story

The movie has way too many funny lines, and though I haven't watched it in years, I still frequently quote them.

[Inkidu]

- Dodgeball: A True Underdog Story

The movie has way too many funny lines, and though I haven't watched it in years, I still frequently quote them.

Oh, I have fully adopted, "You are [that is] about as useful as a doody-flavored lollipop." 

[Victoria Skye]

The french version of the first Mortal Kombat, when Shang Tsung says something like "You'll die tonight !"

In french, it was said with -the corniest- voice "Tu va mourir ce soiiiir!" And god it wrecked me. 

Now I say that to people I play fighting games with !

[Azuresun]

Originally by Evey in The Mummy, "You're not helpiiiing!", in a politely stressed voice.