私房钱指某人偷偷地将钱留起来并希望永远没人知道，尤其不希望他的伴侣知道，因为他是有目的的。

Case-dough means that someone has some money secretly and would like to keep it permanently secret, especially he doesn't want his spouse to know it, because he has some purpose.

youdao

也许有天他会用私房钱给你个惊喜呢。

Maybe he will give you some surprise with his egg money.

youdao

也许有天他会用私房钱给你个惊喜呢。

Maybe he will give you some surprise with his egg money.

youdao