君子协定

tā hé mǎi zhǔ lì le gè jūn zǐ xié dìng

她和买主立了个君子协定。

She made a gentleman's agreement with her buyer.

wǒ men méi yǒu qiān hé tong jiù dìng le gè jūn zǐ xié dìng

我们没有签合同，就订了个君子协定。

We had no contract. It was done by a gentleman's agreement.