"You've Got Another Think Coming"...Or "Idioms That People Mis-say"

  At the lunch table the other day, my family (through various paths and roads) began discussing idioms that people mis-say (yes 'mis-say' isn't a real word).  There are only going to be two examples in this post, but there are others.

  Exhibit A: "You've/They've got another think coming".  Most people say, "You've/They've got another thing coming".  But that's not the way the saying goes!  Google it.  And think about it.  When you use that idiom, you are speaking to/of someone who thought wrong....so they've got another think coming!

  Exhibit B: "I don't give a Tinker's dam".  Now, most people know this idiom with a cuss word, courtesy of Margaret Mitchell. 

  "Tinker's-dam - a wall of dough raised around a place which a plumber desires to flood with a coat of solder. The material can be but once used; being consequently thrown away as worthless".

  Hence the saying, "I don't give a Tinker's dam."  Whatever the person is trying to tell you or show you or whatever it is, is absolutely worthless. 

  Thanks for joining me guys!  Do you know any idioms that people do not say correctly?

P.S. I offer my humblest apologies if I offend anyone with this post.