slap

n. 掴,侮辱,拍击声
v. 拍击,侮辱,申斥
ad. 正面地,直接地,突然地

He slapped me on the back on my way home.

在我回家的路上，他在我背上拍了一下。

His decision was a slap in the face to those who had tried to change his mind.

他的决定对于那些试图要说服他的人不啻是一记耳光。