形容词

1. 不礼貌的;傲慢的;莽撞的
If someone talks or behaves in a rather impolite and disrespectful way, you can say that they are being impertinent .

1. improperly forward or bold

e.g. don't be fresh with me
impertinent of a child to lecture a grownup
an impudent boy given to insulting strangers
Don't get wise with me!

Synonym: freshimpudentoverboldsmartsaucysassywise

2. not pertinent to the matter under consideration

e.g. an issue extraneous to the debate
the price was immaterial
mentioned several impertinent facts before finally coming to the point

Synonym: extraneousimmaterialorthogonal

3. characterized by a lightly pert and exuberant quality

e.g. a certain irreverent gaiety and ease of manner

Synonym: irreverentpertsaucy