Use 变卦 (biàn guà) to express “change one’s mind”

"变卦" (biàn guà) means that someone suddenly changes his/her mind on something that has already been decided. People usually use this word to express dissatisfaction with the person who has changed.

“变卦”是指某人已经决定好做某事又突然改变了主意。说话人用这个词时，表示对某人突然改变主意的不满或埋怨。

Examples: 

1. wǒ tǎo yàn biàn guà, wǒ bú huì fù nǐ yì bǎi měi yuán. biàn guà shuō míng nǐ sā huǎng.

我讨厌变卦，我不会付你100美元。变卦说明你撒谎。

I hate to go back on my word, but I won't pay you $100 afterall. Going back on your promise makes you a liar.

2. zuó tiān shuō dé hǎo hao de, zěn me biàn guà le ?

昨天说得好好的，怎么变卦了?

Yesterday you agreed. What made you change your mind?

The article is translated and editted by Chinlingo. Please indicate the source for any use, reproduction or transfer. 

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