Ah, The Long Kiss Goodnight. “The Dog, Alice . . .” 
We do a lot of Mel Brooks’s stuff around our house.
When you have an idea:
“I just had a wonderful idea! . . . What was my idea?” - History of the World, Part I
When lifting something heavy:
“I got it, I got it, I got it, I ain’t got it.” - High Anxiety
When offering someone food/drink:
“Some varm milk, perhaps? . . . Ovaltine!” - Young Frankenstein
Winston Bongo: I believe that’s reference in …Say Anything in a conversation between Lloyd Dobler and his young nephew.
Because it’s not obscure yet.
When someone asks me about how I’m building something, I often say, “220, 221, whatever it takes.” - Mr Mom
And since no one got it, “Wee-na” is from 1960’s The Time Machine
Someone asks me what I’m doing:
“Learning about Cuba and having some food.”
Here’s pre-1970’s. Whenever somebody is rationalizing a choice or behavior or trait by trying to show it is better than another option:
“I’d rather have peanut brittle on my face than flies in my eyes” From Catch-22.
Whenever I’m saying goodbye:
“BYE! Dan from FL”
From the Homestarrunner.com e-mail which Homestar fielded.
This one here is weird. It’s from Snatch but it’s not the actual quote. The actual quote is “He dodges bullets Avi”. But a friend misquoted it and it entered my vernacular. In explanation of something:
“They’re bullets Avi!”
I also will quote Pulp Fiction at totally random parts for absolutely no reason at all. I may just all of a sudden non-sequitorly say “See, the way it is right now you take the same risk as when you rob a bank. Y’take more of a risk actually, banks are easier”
or some other quote nobody really remembers.
Well, aside from sprinkling my normal speech with Farscape terminology (Frell, Dren, Fahrbot, Arns, etc…), whenever someone at work uses the intercom to try to find one of my co-workers (or me), i typically respond in a low, guttural voice…
“There is no <insert name> only Zuul!”
There is no MacTech, only ZUUL!
“Click.”
“Did you just hang up?”
“No, I just said ‘Click’.”
From the very funny and very stupid STUDENT BODIES.
Also, my little brother and I often look at each other, nod our heads, and the cock imaginary guns. It’s from a small “Dangers of Parachuting” bit from Liquid Television. I don’t think that counts though.
And more and more keep dawning on me:
“You might, rabbit, you might.” Looney Tunes are indeed seriously quotable. But not all that obscure.
And to this day I can still annoy the piss out my very short mother with a bit from Cannonball Run. Any time she needs to stand on a chair or ladder to reach something (which doesn’t happen that often as she’s got a phobia about heights)
“That’s because you’re small. Ess emm all.”
[sub]I’ve also been known to do the Captain Chaos theme song when I’m about to embark on some bit of calculated stupidity. Dunn dunn duuuuunnnn![/sub]
“Brace yourself, Effie”
Some more of my favorites: When I’m about to do something really dumb/stupid (i.e. charging straight across all 6 lanes of a road), yelling “Spoooooooon!” is a must. Inspired by a friend who did the same.
Leaving the room in a speedy manner: Raising my hands over my head and going “Wooooosh!” like Freakazoid.
Making fun of something lame: “Stamp Collection? Ha ha!” from one Simpsons episode where the house caught on fire or something and Bart worries aloud about his stamp collection. The phone rings, he answers it, and Nelson says, “Stamp collection? HA ha!”
When someone at work mentions something they read on the internet I say…
“WHAT THE F^CK IS THE INTERNET”
From Jay and Silent Bob strike back.
They just look at me funny and walk away.
You do know that’s from The Tick, right?
Be a terrible shame if you’ve been yelling “Spooooooon!” all this time without a proper appreciation of the lineage…
I’ve gotten so I no longer realize when I’m quoting until someone points it out…
The only one that I’m sure of right now is:
“If Andrew gets up, we’ll all get up, it’ll be anarchy! Cats and dogs, living together, mass hysteria!”
(First sentence, Bendor from Breakfast Club, second sentence, Venkman from Ghostbusters.)
Another “Breakfast Club” quote I like to use when my friends say something I think is stupid.
“lets face it…Your a neo maxi zoomed weebie”
“zoom dweebie”
“Oh, come on, that was DAMNED funny!” – from A Few Good Men
“Is that the _____________?”
“No, it’s just a ____________ – haven’t you heard, they come in six-packs now?”
–from the Hitchhiker’s Guide to the Galaxy, slightly edited. Insert Zaphod Beeblebrox into the blanks
“Water go down the hoooooole… I want to flush it again!” – from some baby duck in Tiny Toon Adventures. I have no idea why I use this one
“This mall has everything.”
“Don’t touch it – it’s EVIL!!!”
I’ve never got around to doing it, but I’ve wanted to incorporate into regular thingys one of my favorite running gags from Freakazoid!: every episode that had a “cast list,” be it written or spoken, ended with “and Weena Mercator as the hopping woman.” Seems like just the funny thing to end a long list of people.
I didn’t realize how many of these I use myself until I read them all here!
Whenever I can’t think of a response to someone…
“Burma!”
When somebody asks about the consequences of doing something…
“It would be bad.”
Whenever someone mentions Italy…
“Ciao!”
One that I have been wanting to use recently, but haven’t, because I thought it just wasn’t appropriate at this time…
Recently I have seen a number of news reports talking about how Saddam Hussein had killed umpteen thousand (million?) Iraqis. Every time, I am tempted to blurt out “Er, Uh, well done! You must get up very early in the morning! … Death, death, death, death, LUNCH, death, death, death, AFTERNOON TEA, death…”
Any obscure quote from MST3K will do-especially as a lot of their comments were originally obscure. (ex: “I thought you were Dale!”)
Or stuff from *Star Wars[/] books: “You can’t look dignified when you’re having fun!” is my favorite.