"a certain irreverent gaiety and ease of manner"
"an issue extraneous to the debate"
"the price was immaterial"
"mentioned several impertinent facts before finally coming to the point"
"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!"
The more distant, disjointed and impertinent to..any common purpose, will they appear.