眉飞色舞 [méi fēi sè wǔ]

• beam with joy; smack one's lips; a look of exultation; brighten up with joy; exultant; one's eyebrows dancing; One's eyebrows were dancing with pleasure.; lively; with a beaming countenance; with dancing eyebrows and a radiant face -- enraptured:

  I gazed in happy surprise at his animated expression.

  我惊喜地望着他那副眉飞色舞的神情。