洩露秘密
(無意中)洩露秘密
to tell a secret carelessly or by mistake
I wanted it to be a surprise, but my sister let the cat out of the bag.我想給大家來個驚喜,可我妹妹卻先說漏了嘴。
釋義來自《牛津高階英漢雙解詞典》第 9 版