boaster

At the party, the boaster kept talking about his own achievements nonstop.

用法提示：boaster 作主语，指一个爱自夸的人，与语境中的社交场合搭配。

The team grew tired of the boaster who claimed he alone won every game.

用法提示：boaster 作宾语，指代一个具体的人，用于描述团队中令人反感的行为。

Despite being a boaster, he failed to deliver on any of his promises.

用法提示：boaster 作表语，通过转折结构突出其言行不一的特点。