Dumb and Dumber - loved it as a kid, probably love it more as an adult. The back and forth when they decide to go Aspen, a place that's warm, still kills me.

Wedding Crashers - Saw it opening night and laughed the whole way through. Saw it again the next night and laughed the whole time again at all the jokes I missed the first time.

The Hangover - missed it in theaters, but watched it at home and had to pause several times to finish laughing so I didn't miss anything.

Honorable mention
Eurotrip
Waiting...

Superbad

Monty Pyhton's And Now for Something Completely Different.
Followed closely by The Great Dictator

Role Models
Dodgeball

Meet the Parents

You gotta spike those ****er!

Bunk Moreland said:

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Was just the right night with the right friends. Harold & Kumar. We didn't know what we were even walking into and it was hilarious.

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This x 1000. We wanted to see something else that was sold out so we got tickets for this instead. Only time in a theatre that I thought I might actually hurt myself laughing.

I don't think I've seen it all the way through since, but damn that night it was funny

Classics:

Planes, Trains & Automobiles
Dirty Rotten Scoundrels
Uncle Buck
Vacation / European Vacation
Caddyshack
Trading Places
Airplane
Raising Arizona

More Recent:

Eurotrip
Superbad
The Hangover
Bridesmaids
Baby Mama
Meet the Parents

Better Off Dead
One Crazy Summer
Happy Gilmore (already mentioned but man it's funny)
Tommy Boy
Austin Powers
The Brady Bunch Movie (I thought it was hilarious how it made fun of them)

Mrs. Doubtfire
Dumb & Dumber
Liar Liar
Austin Powers 2
Billy Madison
Tommy Boy
Black Sheep
Happy Gilmore
Talladega Nights
Step Brothers
The Hangover
Thor Ragnarok

Spinal Tap - from the premise to the puns -- all of it cracked me up.

History of the World Pt 1 - Brooks' broad comedic vision works with history.

Gods Must Be Crazy - South African slapstick and hilarity.

Going WAY Back - Duck Soup with the Marx Brothers is one of the funniest movies I have ever seen.

WelchAg said:

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you're crazy man... i like you, but you're crazy.

I had to get up and leave as soon as I heard the "whale's vagina" line in Anchorman. It was just so stupidly funny I had trouble breathing.

That was the hardest I've ever laughed in a movie theater.

Movie that stands out as the hardest and most I have laughed in a movie is Rat Race.

As far as entire movies:
The Hangover, Super Troopers, 40 year old virgin

Honorable mentions for movies that I didn't expect to laugh as much as I did: 21Jump Street, Zombieland, Army of Darkness

And - Old School "Dart In your Neck" has to be the most gut busting scene of all time for me though.

Young Frankenstein
Tommy Boy
The Hangover

Surprised nobody has mentioned What About Bob?. I've probably watched it over a hundred times. The dynamic between Bill Murray and Richard Dreyfuss is phenomenal.

I'll be quiet.

I'll be peace.

The Hangover and Ted.

I laughed a lot at Rat Race, so that is my dark horse candidate.

So many great ones mentioned. But for me this scene may be the hardest I've ever laughed in a theater

Team America

Borat

Never watched them again but laughed my ass off.

I've watched this move over 100 times as well. Didn't see it in theaters so doesn't qualify for me. So great.

Quote:

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I went to the old Meyerland Theater

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R.I.P. I saw Return of the Jedi there as a wee one. Couple other movies too, but ROJ was the first really memorable theater experience.

Social Media Influencer said:

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Quote:

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I went to the old Meyerland Theater

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R.I.P. I saw Return of the Jedi there as a wee one. Couple other movies too, but ROJ was the first really memorable theater experience.

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I saw bunches of movies there growing up. Dad worked at the Shell office in Bellaire, just down the road a bit from Meyerland, so that was our go-to theater. I can't say which I saw first, but I remember being roughly 5 and dad taking my sister and I to see both Godzilla Versus the Smog Monster and Disney's Robin Hood. Yeah, I'm old.

I always liked the way the screen was lit in a cold blue light, and it had a frame around it that made it appear inset into the wall.

Most have already been mentioned, but I'll nominate the Ace Ventura films

The table scene in Nutty Professor made me laugh harder than any part of any movie.