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
Gore	GAWR	English (Rare)
Vivian	VIV-ee-ən (English)	English, Swedish, Norwegian, Danish
Isabelle	ee-za-BEL (French), IZ-ə-bel (English), ee-sah-BEL-lə (Dutch)	French, English, German, Dutch
Astell	['æstl]
Hild	-	Anglo-Saxon
&Thorn;ÓRbjÖRg	-	Ancient Scandinavian