翻手为云,覆手为雨 fān shǒu wéi yún,fù shǒu wéi yǔ
[as changeable as the moon;blow hot and cold] 手向上翻时是云,手向下翻是雨。比喻反复无常或善于耍手段、弄权术
见“ 翻手是雨,合手是云 ”。