1. He would often very impudently and indecently laugh at his companion for his serious behaviour.

2. Yet, I didn't understand that she was intentionally disguising her feelings with sarcasm; that was usually the last resort of people who are timid and chaste of heart, whose souls have been coarsely and impudently invaded; and who, until the last moment, refuse to yield out of pride and are afraid to express their own feelings to you. Fyodor Dostoyevsky 

3. A lean , swarthy fellow was peering through the window, grinning impudently.

4. He walked into the shop and calmly ( ie impudently and self - confidently ) stole a pair of gloves.

5. She was his favorite and could speak to him so impudently.