Even better is when Fletch leaves the Records room after passing out and asking about Alan [Ellen] Stanwyk. As he walks out of the records room, he passes by the pathologist and Dr. Jellyfinger, who gave him the proctological exam. To make sure Dr. Jellyfinger doesn't see him, he blows up and loudly pops the paper bag, causing the pathologist who made him pass out, drop what I can only assume is the aforementioned spleen, onto the floor. You can hear it go splat, when they drop it on the floor!

Don't think anyone mentioned this one. when Fletch is asked by the pathologist to give him a hand with the autopsy, he's standing there and the smell is affecting him. something falls on the ground and is clanging around, Fletch says "I'll get it" right before he passes out.

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What are you doing up there? You doing some stuuunt fliiiiyun or somethin?
Don't spread my wealth, spread my work ethic
s

Can I borrow your towel for a sec? My car just hit a water buffalo.

The convention speech

This movie is loaded with classic funny lines, making it difficult to pick one funniest line.
"Isn't there a children's book about an elephant named Babar?"
"I don't know. I don't have any."
"No children?"
"No, elephant books."
"Mooon Riverrrr Ever serve time, doc?"
"I'm sorry, who are you again?"
"I'm Frieda's boss."
"Who's Freida?
"She's my secretary."
From Lakers legend Chick Hearn: "Let's take a look at the player. He is actually 6-5, with the afro 6-9."
"Ever seen a spleen that size?"
"No, not- not since breakfast."
"Don't tell me my business, boy. Just checking the luggage. Somebody oughtta clean these windows. There is a tremendous build-up of beep all over them."
"O-oh say can you seeee!!!"

My of my favourite bits (that hasnt already been mentioned), is when he is talking with Frank, who is holding a coffee pot and getting so annoyed he starts shaking.
Fletch picks up a foam cup and says "can i help you with that" and starts shaking the cup in front of the pot.

I don't shower much

At the end, when he and Gail are held at gunpoint by Alan and in walks the chief. Fletch's face is all surprise and he says "Thank God! The police." Each word has less and less (faux) enthusiasm.
Dainty things never shrink from Lux!

few of my favs are
moon river
come on ill buy you some more deoderant.
he always gives me that look. you know he's got that look.
im fredas boss. whos freda. my secretary.

Nurse:"Can I get you something?"
Fletch:"Do you have the Beatles White album?Nevermind, just get me a glass of hot fat, and bring me the head of Alfredo Garcia while your out there!"
Hahahahahahaha! The list is endless..classic, cheers Mr Chase!

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"Do you want to look at the reception?"
"No thanks, I'm trying to quit"

walking up to stanwyk's house.
"what a coincidence. you know i almost bought this house? then i found out hopalong cassidy killed himself here. bow and arrow. very weird."

The two funniest for me
(1) The second scene of Fletch at the California Racquet Club. Fletch's limited responses and timing with the server is a perfect encapsulation of the movie.
(2) As Gordon Liddy the airplane mechanic

• "I don't think he's doing too much singing with the Tabernacle Choir."
• "Hehehehehe"

When Fletch imitates Gail Stanwyck (him saying 'wee-wee' in a girly voice was outrageous) and when his tape recorder goes off in the airplane.
http://www.imdb.com/mymovies/list?l=19982510

my fav. line that no one has mentioned (i think) is
" i love your body, larry"

That was the funniest scene for me as well, it was hilarious when I saw it in 1985, and I still laugh every time I see it. So over the top, it dares you NOT to laugh.
"And now our ownFred'The Dorf' Dorfman!"

Every time he burns his arm on the airplane I have to rewind it like five times. Priceless!