What, what, what? What is that supposed to mean?

4 seconds sound clip from the Planes, Trains & Automobiles (1987) movie soundboard.

You can hear this line at 00:23:10 in the Blu-ray version of the movie.

Quote context

[...]

- Sorry.

- Goddamn!

- What, what?

- That's it!

- If I don't clear my sinuses, I'll snore all night.

- If your kid spills his milk, what do you do, slap him in the head?

- What, what, what? What is that supposed to mean?

- You're not a very tolerant person.

- Look, you've been under my skin since New York.

- Starting with ripping off my cab.

- God, you're a tight-ass.

[...]