bumptious

adj.盲目自夸的,盲目自大的,傲慢的

自以为是的；傲慢自大的；过分自信的。

形容词

1、He was a bumptious young man who always thought he knew better than everyone else.
他是一个傲慢自大的年轻人，总是认为自己比别人都懂得更多。

2、Her bumptious attitude was often off-putting to others.
她那自以为是的态度常常让人讨厌。