La contraseña siempre es Swordfish

Baravelli (Chico Marx): …you can’t come in unless you give the password.
Professor Wagstaff (Groucho Marx): 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.
[After several unsuccessful guesses]
Baravelli: 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?

— Horse Feathers (1932), película de los Hermanos Marx. Primera aparición de “Swordfish” como contraseña genérica.