Used as a sarcastic comment for someone who stated the obvious, using a reference to the famous fiction detective Sherlock Holmes, it can be understood as "No way, you are Sherlock Holmes!" which can actually mean "Of course, you dumbass!".
-It's hot out there.
-No shit, Sherlock!
by CesarD11 November 7, 2014
When you reply to spmebody who has just stated the very obvious ''no shit,sherlock' to imply that yep, everyone knows the answer already and there pronouncement has come as no surprise.

sherlock=sherlock holmes, famed detective of yore
''hey, you got a tissue trail hanging out the back of your knickers''

''no shit, sherlock''

''but like, you've got a tissue tail hanging out the back of your knickers''

''no shit sherlock, its the latest craze!!''
by Doctor P.J April 5, 2010
A phrase often used towards someone who states the obvious.
"There is snow outside, it must be cold"
"No shit Sherlock!"
by NowhereMan November 4, 2004
Similar to 'thank you captain obvious'.
Something you say to a dumbass who points out a completely obvious thing!
Dumbass: "Hey, your head is on fire!"
Smartass: "Yeah, no shit, sherlock!"
by Daniel Hough April 12, 2004
meaning 'well of course dumbass!'
other phrases like this include grass is green
bob: i lost my brain! =)
jim: no shit sherlock
by =virus.exe= November 30, 2004
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
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