brag 吹牛，自夸，夸口

　　Don't brag about what you're going to do. Do something first.

　　先别吹你要做什么，做出点事情来。

　　He often brags about how well he plays football.

　　他常常自夸他足球踢得如何如何好。

　　疯狂练习吧！