cheekily

/ˈtʃiːkɪli/
adverb
  1. In a way that is slightly rude or disrespectful, but often amusing or playful.
    • He grinned cheekily and said he had already eaten the last cookie.
    • She cheekily asked the teacher if the homework was really necessary.
    • The little boy cheekily stuck out his tongue at his sister.
Antonyms
What does "cheekily" mean? | whatsthatwordmean | whatsthatwordmean