Some Like It Hot

Knight and Day

Kind Hearts and Coronets

Airplane

Taken
Taken2
Taken3

Planes, Trains and Automobiles, American Pie all of them, Ted 2, Tin Men, RV just to name a few.

It's A Mad Mad Mad Mad World
Young Frankenstein
Blazing Saddles
Sleeper
Monty Python And The Holy Grail
Animal House
What About Bob
My Cousin Vinny
Superbad
Role Models
Mystery Team
The Ladies Man (Jerry Lewis)
The Time Of Their Lives (Abbott & Costello, almost any of their movies)
Airplane!
Top Secret!
The Burbs
Dirty Rotten Scoundrels
Noises Off
Murder By Death
This Is Spinal Tap
Pee Wee's Big Adventure
Beetlejuice
Caddyshack
Stripes
The Blues Brothers
Cannibal Women In The Avocado Jungle Of Death
The Kentucky Fried Movie
Amazon Women On The Moon
Real Genius
Weird Science

Clifford. ( martin Short ) Hilarious ! especially scenes at the Country Club - 40 min in

The Little Death - very dark Aussie comedy
A PG rating , nothing visually graphic.
About Fetishes
There is a scene near the end of the movie.
phone sex for a deaf man. a female interpreter at video relay centre, who talks to the female phone sex operator . She is reluctant to sign literally.

Hilariously funny !!!

Absolute funniest ever:

Ace Ventura - When Nature Calls

I don't like comedy/funny movies so much, but this one dang near killed me with laughter. I seriously had to pause the vid to recover

American Pie

Trailer Park Boys
Waiting - my favorite comedy
Norbit
Let's Go To Prison
Sling Blade - Accidentally funny, Dwight Yokam was hilarious

History of the world, part 1

One flew over the cuckoos nest

Forgot Simon Pegg and Nick Frost:

Shaun Of The Dead

Hot Fuzz (the documentary Fuzzball Rally about Simon, Nick, and Edgar Wright's American press tour for Hot Fuzz is hilarious)

The World's End

Paul