a volte-face

(formal)

a sudden change of a belief or plan to the opposite of what it was before In the early 90's he made a complete political volte-face, moving from the Republican Party to the Democrats.

Common Names:

Name	Pronounced	Usage
Tawny	TAW-nee	English (Modern)
Claude	KLOD (French), KLAWD (English)	French, English
Ambrosia	-	Ancient Greek
Pamphilos	-	Ancient Greek
Ketill	-	Ancient Scandinavian
Abd Al-Qadir	-	Arabic