It's like the person said something that was pointing out the obvious....kinda like "no duhh!"
person one: The sky is blue!!
Person two: No Shit Sherlock!!
by Bob Marley LOver!! lol jk jnm November 19, 2010
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duh.

what you say when someone says something very obvious.
Dude: tomorow is monday. we have school on mondays.
Dude 2: no shit sherlock!
by Hugs4TheEmoKid June 24, 2005
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Asshole version of 'indeed'.
Sherlock: It appears as though my obsession with Moriarty has finally gotten the better of me.

Watson: No shit, Sherlock.

*Sherlock proceeds to kick the shit out of Watson.*
by vermillion22 November 18, 2013
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Stating something obvious, this is a sarcastic way of saying "It's very obvious, you can shut up now."

The victim can follow up with "Fuck you Watson" or similar to defend themselves.
"I skipped 80 of the 100 questions on this test, I might get a bad mark!"
"No Shit Sherlock."
"Fuck You Watson."
by Voldemort Less than 3 May 14, 2009
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When someone says something very obvious
*everyone sees red kill black*

Yellow: yo i think red is the impostor*

everyone: NO SHIT SHERLOCK!
by pseudonym ツ October 7, 2020
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When someone points out something very obvious
Bill: It’s raining outside
David: No shit sherlock, you think I don’t notice that?
by hamburger2020 May 1, 2021
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A very sarcastic way of saying: obviosly.
(Sherlock Holmes was a detective in a classic series of books.)
by colonel klink March 29, 2005
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