Movies
You know, these clothes do not flatter you at all. It should be a dress or nothing. I happen to have no dress in my cabin.
— Jack Sparrow • Pirates of the Caribbean: Dead Man's Chest

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
This is a cheeky bit of flirtatious logic. The speaker insults the outfit, then narrows the options to a dress or nothing, and finishes by admitting there's no dress on hand. The joke is that the argument was steering toward the "nothing" option all along.
Context reviewed