slip of the tongue 口误，失言，说错话

　　Clearly, this was not just a slip of the tongue.

　　很明显，这并非一时失言。

　　He didn't mean to hurt you, he only made a slip of the tongue.

　　他只是一时说错话，根本没有想伤害你的意思。

　　疯狂练习吧！