you don't say

Idioms  

1. How surprising, is that true? Also, I find that hard to believe. For example, I've been working on this project for two years.—You don't say, or The man who runs this soup kitchen is a real saint.—You don't say! This expression, a shortening of you don't say so, may be used straightforwardly or ironically. [Late 1800s]

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Example Sentences

“You don’t say,” murmured Uncle Alf.

From Literature

You don’t say what you do for a living.

From MarketWatch

"You have people who want to come in to have a look at the castle but they can't because it's out of bounds for the public, but you don't say to them to clear off, but suggest they go up to Parliament Buildings for a cup of tea or a meal," she said.

From BBC

“Raised by wolves! You don’t say,” he exclaimed when she was done.

From Literature

Mr. Leibovich writes that one of Cheney’s political mantras—“You never get in trouble for something you don’t say”—was first attributed to Sam Rayburn.

From The Wall Street Journal