Idioms that become stranger the longer you think about them

As per usual, I may add more to this li.st at some point; probably when pigs fly...
  1. Screwed the pooch
    Imma let you think too much about this one
  2. Kill two birds with one stone
    Just... How?
  3. On the ball
    That requires excellent balance; or are we circus performers?
  4. and Bob's your uncle
    Naw, my uncle's name is George
  5. Pardon my French
    Isn't this a bit *#$!%@* racist (Or something)?
  6. Cat's got you tongue
    Just get it back with a dose of curiosity
  7. Going postal
    Also known as going slow and outdated?