insolently       
adverb uk/ˈɪn.səl.ənt.li/ us/ˈɪn.səl.ənt.li/
 无礼地,侮慢地
in a rude way that does not show respect
  The boy grinned insolently at her. 男孩无礼地冲她咧嘴一笑。 
 "Whatever," she said insolently. “随便吧,”她傲慢无礼地说。 
 See: insolent
 - More examples
 - Leo was staring insolently at his opponent.
 - "You'll need to show me again, won't you?' she added insolently.
 - At lunch he spoke insolently to his father.