用中文说: "Let the cat out of the bag"

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Let the cat out of the bag

【中文】不小心说漏嘴、露马脚、透露秘密

   Bù xiǎoxīn shuō lòuzuǐ, lòumǎjiǎo, tòulù mìmì

【解释】 To reveal a secret carelessly or by mistake.

【例句】

- I'd better not to know the details of the plan in case I let the cat out of the bag one day.

 我还是不知道这个计划的细节为好，以免哪天我不小心说漏嘴。

 Wǒ háishì bù zhīdào zhège jìhuà de xìjié wéi hǎo, yǐmiǎn nǎtiān wǒ bù xiǎoxīn shuō lòuzuǐ.

- He is trustworthy and he is tight-lipped. There is no way that it was him that let the cat out of the bag.

 他值得信赖,嘴巴也很紧，露马脚的不可能是他。

 Tā zhídé xìnlài, zuǐbā yě hěn jǐn, lòumǎjiǎo de bù kěnéng shì tā.