whistle a different tune

To change one's opinon 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!

Common Names:

Name	Pronounced	Usage
Hildiberht	-	Ancient Germanic
Aada	AH:-dah	Finnish
Majda	-	Slovene, Croatian
AsİL	-	Turkish
Bianca	BYAHN-kah (Romanian)	Italian, Romanian
Allan	['ælən]