“Cat Got Your Tongue?” – The Origin of Common Expressions

Every one of us at one time or another used a phrase in a conversation and thought, "that is the weirdest thing to say; where does that come from?"  Whether you mentioned you just started a "graveyard shift," or your coworker was "Johnny on the Spot" with his report, it's very common to wonder how these turns of phrase began and what their original meaning was.  Submitted for the approval of the RKArmy, I give you to "14 Expressions with Crazy Origins."