whistle a different tune

whistle a different tune

To change one's opinion or behavior. He never used to support that political candidate, but he's whistling a different tune all of a sudden. I used to be very pessimistic, but ever since surviving that car wreck, I've been whistling a different tune!
See also: different, tune, whistle
Farlex Dictionary of Idioms.
See also:
  • (one's) jollies
  • come in
  • come in a certain position
  • come on in
  • be (flat) on (one's) back
  • (Is) that everything?
  • a little goes a long way
  • by half
  • damn well
  • flat on (one's) back