The film: Does The Godfather really need an explanation? The 1972 flick the first in the saga of Don Corleone (Marlon Brando) and his clan is still the mobster movie, more than 35 years later.
The line: "I'm going to make him an offer he can't refuse."
The setup: Uttered by Corleone (and copied by hordes of would-be mimics) in reference to a studio head who has refused to offer a part to singer Johnny Fontane (played by Al Martino). That, um, offer? It's on display in one of the movie's iconic scenes, when the executive in question wakes up with a bloody horse head in his bed.