Now I've seen everything!

Now I've seen everything!

I can't imagine seeing anything as amazing, unexpected, strange, or unbelievable as this! (Usually used hyperbolically.) Democrats and Republicans agreeing on a tax reform law? Now I've seen everything! I just saw the intern totally reduce the boss to tears in a shouting match—now I've seen everything!
See also: now, seen
Farlex Dictionary of Idioms.
See also:
  • don't that beat the Dutch!
  • I can't believe it/that/this
  • I can't believe!
  • browbeat
  • browbeat (one) into (something)
  • browbeat into
  • perky
  • you can't expect (one) to believe (something)
  • You can't expect me to believe that
  • you don't expect (one) to believe (something)