Bingo! Too easy?
“You sit on a throne of lies!”
Elf. Buddy, Will Ferrell’s character, said it to a Mall Santa.
Everyone I know has a got a big ‘but.’
Pee Wee’s Big Adventure.
Go on out and get some air, fatso!
Dirty Harry. https://www.youtube.com/watch?v=iBRr6ctZQJs
Even if we play so far above our heads that our noses bleed for a week to ten days; even if God in Heaven above comes down and points his hand at our side of the field ; even if every man woman and child held hands together and prayed for us to win, it just wouldn’t matter
Like I always say - put a fox in the henhouse and you’ll have chicken for dinner every time.
The Quick and the Dead
Yes.
“Why if only we were all wiener dogs, our problems would be solved.”
I knew it was Clint Eastwood, and I knew it was one of the Dirty Harry movies; took a little while to remember which one.
I would have gotten the other Dirty Harry one, but I didn’t see it.
Let’s try:
“Legs, you’re with Ducky.”
I was thinking Sixteen Candles, so I checked. Not it! Good one though.
(Joyously) “You want me to knock up your women?!?”
“We ain’t blood kin. We’s more like kissin’ cousins.”
Robert Easton to Diane Lee Hart in The Giant Spider Invasion.
“Does that mean you gonna cut his leg off?”
Hot slave in The Beguiled, in response to “Oh, dear! We’re going to have to amputate!”
“Amerikanskii Lee-ber-tee sheep!”
Russian fighter pilot in Action in the North Atlantic.
“The Chinese Victory March!”
Band leader in The Stage Door Canteen.
(Austrian accent) “He’s using trees!”
Ahrnold in Predator.
“How would you know?”
A Boy and His Dog
I knew somebody would get this one right off the bat! 
(At a dance) “I’m 32, […]. How old are you?”
“The magic is strong, and so are the drinks.”
One of my favorite Disney movies, Encanto.
That was fast! 
“Banzai!”
From two completely different movies; see if you can identify the common denominator:
“It’s a trick question!”
and
“Any of you guys got any toothpaste?”
Charlie Sheen as “Topper” in Hot Shots.
One more:
“Ein und zwanzig Kriegsmariner.”
“I’m gonna shoot the guy right in the lombardos.”
Smokey and the Bandit
“I’m a liberal Democrat lawyer from Wisconsin.”