rudeness and the quality of being unable to understand that your behaviour or what you say is not acceptable to other people鲁莽;厚颜无耻
[ + to infinitive ]Considering that he never even bothers to visit my parents, I'm amazed that Tim has the gall to ask them for money!蒂姆从不去看望我父母,可他竟然有脸去向他们要钱,真让我吃惊!