Cheeky (adjective)

Disrespectfully bold or impudent; insolent.

Origin:

The word cheeky comes from the middle english word "cheke" meaning "bold" or "impudent". the word is thought to have originated in the 17th century.

Examples:

1. He gave the teacher a cheeky grin.
2. It was a cheeky thing to say.
3. She had a cheeky smile on her face.
4. He was being cheeky when he asked for extra dessert.
5. The little boy had a cheeky look on his face.