On a showboat stage, a tall exasperated straight man in a bowler hat gestures at a short, round, baffled comic holding a baseball, a laughing crowd below.

Original artwork, not a still

Dexter Broadhurst

Who's on first.

— The Naughty Nineties ‧ 1945

Behind the line

What it means

Our interpretation.

The whole routine is built on a single misunderstanding that never breaks: the question and the answer are the same word. It is why the line works with no setup, and why people still use it as shorthand for any conversation going in circles. The routine began long before this film, but the 1945 version is the one Americans have actually watched.

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In context

Spoilers for The Naughty NinetiesShow the scene

In The Naughty Nineties (1945), Abbott and Costello play members of a showboat company on the Mississippi in the 1890s, Bud Abbott as the lead actor Dexter Broadhurst and Lou Costello as roustabout Sebastian Dinwiddle. The film is best known for containing a filmed version of their 'Who's on First?' routine, in which Abbott lists baseball players whose names sound like questions, so that Costello's answers keep going wrong. A video of this version plays continuously at the National Baseball Hall of Fame in Cooperstown.

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