打某人的脸的英文翻译是 "to slap someone's face." 这个说法来源于日常生活中打人脸部的动作。

例句：

She slapped his face in anger. 她生气地打了他一巴掌。

He deserved to be slapped in the face. 他应该被打一巴掌。

She was so angry that she wanted to slap him in the face. 她气得想打他一巴掌。