Not too famous, but deserves to be among the best: "My dear, that's something you need never worry about."

And a few lines before that, "You read a book?!"

"I coulda been a contenda."

"I just went gay all of the sudden!"

"Nobody's perfect."

"I'm Spartacus."

"We're on a mission from God."

"Yippie-ky-yay, motherfucker!"

OK, maybe that last one is just me.

Spinal Tap just has so many quoteable lines....

This one goes to 11.
You can't... dust for vomit.
It's a fine line between clever and stupid.

We use variations on this one at home all the time.

It's very versatile.

"Is it safe?"

And a few lines before that, "You read a book?!"

(And for those who don't get it, rent Dinner at Eight. Or just watch next time it's on TCM. December 2 at 8 p.m.)

One point twenty-one jigawatts!

If we're quoting Spinal Tap surely I can quote Ghostbusters.

"That was your plan? 'Grab her!'?"

Okay, so, she's a dog.

You're gonna endanger us. You're going to endanger our client, the nice lady who paid us before she became a dog.

...four FEET above her covers

Igon, your mucus.

Who does your taxes?

I'm gonna miss him!

He slimed me.

You don't usually see this with a large appliance.

...Need I go on?

...Need I go on?

Yes, very quotable movie.

"When someone asks you if you are a god, Ray, you say YES!"

and of course,

"There is no Dana, there is only Zool."

Plus the million innuendoes associated with being the Keymaster of Gozer.

"Who ya gonna call? Ghostbusters!"

"No offense, guys, but I gotta get my own lawyer."

"Human sacrifice, dogs and cats living together...mass hysteria!"

"No human being would stack books like this."

"Back off, man, I'm a scientist."

"Yes, it's true. This man has no dick."

"That's a big Twinkie."

"Don't cross the streams!"

"Now there's something you don't see every day."