no Shinola

no Shinola

1. slang Obviously; that is or was completely self-evident. "Shinola," the name of a brand of (usually black or brown) shoe polish, is used as a substitute for the vulgar term "shit." A: "I think we need to clear that blockage out of the drain." B: "Yeah, no Shinola. Thanks for the tip."
2. slang Are you being serious? Wow, is that really true? A: "My aunt has a cabin we could use for the weekend." B: "No Shinola? That would be awesome!"
See also: no, Shinola
Farlex Dictionary of Idioms.

No Shinola!

(...ʃɑɪˈnolə)
exclam. You are kidding!; No shit! (A play on the expression indicating that a stupid person doesn’t know shit from Shinola. Shinola is a brand of shoe polish.) So taxes are too high? No Shinola!
See also: no
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • No Shinola!
  • NS
  • needless to say
  • go without saying
  • sherlock
  • the facts speak for themselves
  • goes without saying, it/that
References in periodicals archive
But Yorke, still looking for his first point of interest as a pundit, disagreed: "For me, the manager has got some work to be done there." No Shinola, Sherlock.