No Shit

"No Shit" as in "No shit, Sherlock", not the absence of shit.

Said of very obvious claim when made. Often paired up with "Sherlock", like what the slidetext says. "No shit" isn't necessarily sarcasm as a sarcastic reply to an obvious remark would be like "Wow! I never knew that before!" as the speaker doesn't really mean what they said, compared to when they say "No shit", in which case they do mean it.

The phrase spoken does not have to be the exact words "No shit" - it just needs to have a similar function, such as by saying "Well, that's just damned obvious!" in response to what's so obvious.