Dennis and Dee's high fives

and frequently high five each other congratulations after one of them makes a particular satisfying insult.

Season Four

 * After being told that Dennis and Dee couldn't pick the music in their spin class, Dee told her spin instructor that, "maybe you shouldn't dress like a bumblebee, bitch." Dennis laughed and said that the instructor had just gotten dogged, then high fived Dee. (Sweet Dee Has a Heart Attack)
 * A revolutionary Dee told Mac that the girl down at Independence Hall that he was banging was "fat". Dennis said, "Good one, witch!" and high fived her. (The Gang Cracks the Liberty Bell)