What is the funniest movie you have ever seen?
 

I will say airplane or spaceballs.

Office Space

Happy Gilmore

I'd have to say Office Space as well.

"Why should I change my name? He's the one that sucks"

Funniest Movie
 

Blue Collar Comedy Movie

The whole redneck beaver story from Jeff Foxworthy was utterly hysterical. I was literally crying from laughing so hard.

silver

Oldies but goodies: Blazing Saddles and Slap Shot.

The Burbs and The Great Outdoors

Blazing Saddles was great. Also Airplane, Billy Madison,

Have to go along with Blazing Saddles!!

" 'Cuse me while I whip this out!"

drop dead fred

Office Space
Billy Madison
Monty Python and the Holy Grail
American Pie
Airplane

There's others that I just can't think of right now....

ETA:
Half Baked

Jackass was also funny. It had me dying

Mr. Wrong

Blazing Saddles

Army of Darkness

Bridget Jones' Diary

Three totally different movies, but all very funny.

ETA: Dazed and Confused! Don't know how I forgot that one. :D

I have to add my vote for Office Space. Great great movie!!! :D