An extremely corny punchline.
A combination of Falcon Punch and Punchline. Falcon punch originated from the character Captain Falcon starring in the video game F-Zero. His character was later used in the popular Nintendo game Super Smash Brothers. His signature move in the game, the Falcon Punch, is used as a term for an extreme punch. This combines with punchline to express an "extreme punchline".
Bob: Why was there a fence around the graveyard?
Tom: I don't know, why?
Bob: People were dying to get in!
Tom: Now that's a falcon punchline.
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