We are real close…. Airplane, Blazing Saddles, Caddyshack, History of the World.
Also add in Animal House.

Oooh, forgot Caddyshack!

Wait, also Vacation!

My wife just rolls her eyes when we go somewhere and it's closed, 'cause I am guaranteed going to say "Sorry folks, [insert destination] is closed. Moose out front should have told you."

Yep, National Lampoon Vacation(s) mentioned in post 8. The original was classic and the 2 follow ups (European Vacation, Christmas Vacation) were good too. After that, they were pretty weak.

Caddyshack... A close friend and former coworker can pretty much recite the lines of the entire movie

"220...221...whatever it takes."

"zee secret to a happy life is appyness in de hashol"

From Super Troopers

Witness : Striker was the squadron leader. He brought us in real low. But he couldn't handle it.

Prosecutor : Buddy couldn't handle it? Was Buddy one of your crew?

Witness : Right. Buddy was the bombardier. But it was Striker who couldn't handle it, and he went to pieces.

Prosecutor : *Andy* went to pieces?

Witness : No. Andy was the navigator. He was all right. Buddy went to pieces. It was awful how he came unglued.

Prosecutor : *Howie* came unglued?

Witness : Oh, no. Howie was a rock, the best tailgunner in the outfit. Buddy came unglued.

Prosecutor : And he bailed out?

Witness : No. Andy hung tough. Buddy bailed out. How he survived, it was a miracle.

Prosecutor : Then Howie survived?

Witness : No, 'fraid not. We lost Howie the next day.

Prosecutor : Over Macho Grande?

Witness : No. I don't think I'll ever get over Macho Grande.

Gentlemen, you can't fight in here. This is the war room!

"Dave's not here Man"

"Was it over when the Germans bombed Pearl Harbor?"

One of my favorite scenes trying to figure out how deep the water is.

"I want my two dollars!"

"I almost nunchucked you; you don't even realize!"

Classic

“You’re still here? It’s over.”

Male Student: (shouting in a club) What's your major?!
Female Student: (shouting back) Primitive cultures!
Otis Day: (singing) bu-bu-bu-bup who mow mow, Oh OH oh oh!

"Does Anybody knock anymore?"

"It's the first quarter of the big game and you wanna toss up a hail mary? I'd like to be pimps from Oakland or cowboys from Arizona but it's not Halloween. Grow up, Peter Pan! Count Chocula!"

WHAT!?
Did we just become best friends?
YUP!
You wanna go to the garage and practice Karate?
YUP!

I’m going upstairs… ’cause I’m gonna put my nutsack, on your drumset! Okay?

If you do that – I’m warning you, right now! If you touch my drums, I will stab you, in the neck, with a knife!

Suppose Nancy sees me coming out of the shower and decides to come on to me. I’m looking good, got a luscious V of hair going through my chest pubes down to my ball fro. She takes one look at me and goes, ” Oh, my God, I’ve had the old bull, now I want the young calf,” and she grabs me by the weiner.