you don't say!! 

literally speaking it is just another way of saying a very commonly and aptly used phrase "NO SHIT". it is when stating the blatant obvious and saying it as if it was just thought of on the spot. It is used to show distaste in a rather sarcastic and underhanded way and if said properly can be funny to no ends.

a master of this would be Christoffer!!

person 1- sir i dont think the bomb exploded
Person 2- what gave that away, the lack of noise? or the lack of mushroom? or the lack of the afterwave?
person3- it was the no mushroom for me.
person4- you don't say!!!

at an airport gate waiting to be let into the flight
Person 1- so dude we are going on gate number 15 rite?
person 2- oh yeah so lets join the queue for gate 15.
after reaching the near end of the line
person 3- i think we have reached our gate
person 1 and 2- You don't say!!

you don't say!! by ronnie1234 November 6, 2010

You don't say 

Used to express sarcasm when someone states the obvious, or states a fact that has been delivered like a second ago

Fat man:Dude, I think I have become fat
Dude:You don't say

You don't say by cagedidiot August 31, 2013

You don't say? 

Really?

- Hey, did you hear? Jack got aids!
- You don't say?

You don't say? by IchigoFB October 15, 2009

You don't say? 

An expression which appears in rage comics as a cartoonized version of Nicolas Cage. The phrase is a response to anything obvious and functions the same as "No shit, Sherlock" and "thank you captain obvious".

Some guy: I'll tell you a big fact.
Me: And... what is it?
That very guy: Stars don't blink! It's the atmosphere that makes stars look like if they blink!
Me: You don't say?

You don't say? by Definitiosis January 6, 2013

you don’t say, Beyoncé? 

the absolutely best way to respond to all of your girlfriend’s observations

Though not totally listening to what was probably a super important thing she was talking about, I respectfully replied, “You don’t say, Beyoncé?”

you don’t say, Beyoncé? by Squirrel Rito February 25, 2021

you-don't-say-tality 

Somebody who dies from a heart attack because the person who called 911 was a mime.

Sadly, Keith's Aunt Connie was yet another you-don't-say-tality, which is more evidence that you should see a cardiologist before visiting a boulangerie.

you-don't-say-tality by Tank Miller December 4, 2024

You don't have a say 

In the outcome.

Hym "You don't have a say in the outcome."

You don't have a say by Hym Iam June 23, 2025