Les classiques de l'Humour : "What's the Password?" The Marx Brothers

Baravelli: ...you can't come in unless you give the password. 
Professor Wagstaff: Well, what is the password?         
Baravelli: Aw, no. You gotta tell me. Hey, I tell what I do. I give you three guesses. It's the name of a fish.
Professor Wagstaff: Is it "Mary"?
Baravelli: [laughing] 'At's-a no fish!
Professor Wagstaff: She isn't? Well, she drinks like one! ...Let me see... Is it "Sturgeon"?
Baravelli: Aw, you-a craze. A "sturgeon", he's a doctor cuts you open when-a you sick. Now I give you one more chance. Wagstaff: I got it! "Haddock".
Baravelli: 'At's a-funny, I got a "haddock" too.
Wagstaff: What do you take for a "haddock"?
Baravelli: Sometimes I take an aspirin, sometimes I take a calomel.
Wagstaff: I'd walk a mile for a calomel.
Baravelli: You mean chocolate calomel? I like-a that too, but you no guess it. [Slams door. Wagstaff knocks again. Baravelli opens peephole again.] Hey, what's-a matter, you no understand English? You can't come in here unless you say, "Swordfish." Now I'll give you one more guess.
Professor Wagstaff: ...swordfish, swordfish... I think I got it. Is it "swordfish"?
Baravelli: Hah. That's-a it. You guess it.
 Professor Wagstaff: Pretty good, eh?