give oneself away
露马脚，露破绽

例句：
Laura played a joke on her father and gave herself away by laughing.
劳拉想和父亲开个玩笑，可是她一笑就露了马脚。

wallet
钱包，皮夹

例句：
He always keeps a lot of money in his wallet.
他总是在钱包里放很多钱。