翻云覆雨

tā zǒng shì fān yún fù yǔ bù zhī dào tā zài shuǎ shén me huā zhāo

她总是翻云覆雨，不知道她在耍什么花招。

She is always blowing hot and cold and nobody knows what she has up her sleeve.

zhè ge rén fān yún fù yǔ gǎo bù qīng tā dào dǐ zhǔ zhāng shén me

这个人翻云覆雨，搞不清他到底主张什么。

He's a man given to blowing hot and cold. You just can't tell what he's standing for.