no shit

Interjection

Meaning

Used other than figuratively or idiomatically: see no,‎ shit.

(colloquial, vulgar) An exclamation of amazement or disbelief.

(colloquial, vulgar, sarcastic) An ironic response to a statement of the obvious.

Source: en.wiktionary.org

really oh really no way no kidding you don't say

Every time I do a show, I die a little bit, but no shit is worth doing unless you're willing to die for it. Madonna (entertainer)