Drummond was assessed a flagrant foul 2 and ejected in the second quarter of the Pistons' 112-89 victory over the Hornets Tuesday night.
After the contact, Hibbert appeared to flail to draw attention from the referees.
Drummond, who was ejected from the game after an official review, smiled and mockingly applauded the decision as he walked off the court.
"Anybody that knows me, knows I'm not a dirty player," Drummond said afterward. "It's part of the game. He got hit, he did whatever he had to do to get the call. Refs made the call and I was escorted off the floor. Other than that, we won the game and I'm satisfied with that."
The Associated Press contributed to this report.