impertinent

adjective

1. 1

   improperly forward or bold

   don't be fresh with me

   impertinent of a child to lecture a grownup

2. 2

   not pertinent to the matter under consideration

   an issue extraneous to the debate

   the price was immaterial

3. 3

   characterized by a lightly pert and exuberant quality

   a certain irreverent gaiety and ease of manner