摇身一变

摇身一变 [yáo shēn yí biàn]

1. ■ give oneself a shake and change into another form; by a sudden metamorphosis; change suddenly (from ... into ...); change camp overnight; lack a firm belief; make an aboutface; shake and be transformed by magic; shake oneself and change into; suddenly change one's tune; suddenly change one's identity; take the form of ... with a shake; undergo a sudden transformation; up to the trick of a volte-face