presumptuous

a. 放肆的,冒昧的,冒失的

I dislike that presumptuous young man.

我不喜欢那个自以为是的年轻人。

Having or showing excessive and arrogant self-confidence; presumptuous.

冒昧的，放肆的拥有或显示过分的或傲慢的自信的；自行其事的