Airplane. Young Frankenstein. Emperors New Groove. Paper moon.

Naked Gun 1-3

Airplane 1 and 2

Fatal Instinct

Hot Fuzz

The Other Guys

The Gods Must Be Crazy. There are legitimate critiques of its treatment of race since it takes place in apartheid Namibia and South Africa, but everyone in the movie seems to be having a great time and the physical comedy is top notch

My cousin Vinny.

Kung Pow: Enter the Fist

Anything by Mel Brooks

The Princess Bride, and National Lampoon's Christmas Vacation. Both have so many great lines they still crack me up every time!

The life of brian

Hot Rod, Step Brothers, and Tropic Thunder are a few. I love Tucker & Dale vs Evil too

Hot fuzz

What We Do In The Shadows
Tucker and Dale VS Evil

Are the two that make me laugh no matter what.

Shoot Em Up too, but for different reasons.

Monty Python Search for the Holy Grail.

"One day all of this will be yours!"

"The curtains???"

Holy Grail. Animal House.

I still laugh at Shrek.

National lampoons vacation and Christmas vacation, & Planes, Trains, and Automobiles.

Megamind

Monty Python's Life of Brian

Dirty Rotten Scoundrels

Not Another Teen Movie

Hmm, on top of my head I find these very very re-watchable, but there are so many more.

• Some Like it Hot
• Airplane!
• The Naked Gun movies.
• Blazing Saddles
• The Blues Brothers
• National Lampoon's Vacation
• Young Frankenstein
• Robin Hood: Men in Tights
• Planes, Trains and Automobiles
• Happy Gilmore
• The Big Lebowski
• Liar Liar

I can't believe I haven't seen my all time favorite on this list yet.

Supertroopers

I've seen this at least 50 times. I still laugh throughout the movie

Kung Fu Hustle by Stephen Chow

Yes my very unpopular opinion is that white chicks is the funniest movie ever made. So many hilarious scenes. Also, Friday and Superbad always keep me in stitches.

Hot Fuzz

Billy Madison

Out Cold

Major Payne

Blazing Saddles

... Just to name some off the top of my head.

Eurotrip

I Love You Man

Popstar: Never Stop Never Stopping

Zoolander.

Naked gun. All of ‘em.

• The Producers (1967 Version.). Every scene with Zero Mostel and Gene Wilder is unhinged brilliance, and the supportig cast is equally good.
• Arsenic and Old Lace: I know it's a high school drama club staple, but the original film starring Cary Grant is still hilariou. And the plot was way ahead of its time.
• Austin Powers: International Man of Mystery

The Return of the Pink Panther

Beavis & Butthead Do America is hilarious from start to finish

Don’t be a menace to society while drinking your Krunk juice in the hood.

Tenacious D in The Pick of Destiny will have me dying every time, stoned or not. Though most likely baked out of my fucking mind, because that's how it's meant to be watched.

Jay and Silent Bob Strike Back will always hold a special place to me as one of Kevin Smith's funniest, but that's heavily a nostalgic one for me. I remember being one of 8 people in the local theater the day it opened, my dad pulled me out of school to go see it. Even just seeing the DVD menu makes me grin like a loon.

Baseketball

This is the End

Forgetting Sarah Marshall

I love you man

Knocked Up

Rush hour 1/2

Dumb and Dumber

Liar liar

Hangover

The Return of the Pink Panther https://en.m.wikipedia.org/wiki/The_Return_of_the_Pink_Panther

Dirty Rotten Scoundrels https://en.m.wikipedia.org/wiki/Dirty_Rotten_Scoundrels_(film)

Young Frankenstein https://en.m.wikipedia.org/wiki/Young Frankenstein

Delicatessen https://en.m.wikipedia.org/wiki/Delicatessen_(1991_film)

What can I say? A man of simple tastes.

Grandma's Boy!

Major Payne, Grandma's Boy, Shrek 1 & 2, Super Troopers, My Cousin Vinny,

Step Brothers, Talladega Nights and Burn After Reading are three that consistently do it for me.

The princess bride, Stripes, Airplane, Top Secret, The Room, Birdemic, a few others.

Hot Fuzz, Super Troopers, and National Lampoons Chistmas Vacation.

Borat. Why can't I see this higher up. It drives me laughing like crazy.

Not a movie but every few years I do a rerun of Scrubs (but not the last season).