Who knew?

Some malaphors get so embedded in the family argot that their inaccuracy goes unnoticed for decades.  I have two to confess, and both, I apologize, include scatological words.  First, I said "No sh-t, Shylock" for years before some aurally observant soul pointed out that Sherlock was the focus of that statement.  Who knew? Second, in my family the phrase to ingite action was "Fish or get off the pot." It wasn't until today that the Chief Malaphor Specialist pointed out to me that my family had been involved in a Malaphor Mashup of "Fish or cut bait" and "Sh-t or get off the pot."  Once again, who knew?