the art of wearing pants with a "secret pocket" to which you can reach your "member" "secretly". especially in english class. then nutting in your pants while looking at a certain someone in the seat in front of you. only to clean up after yourself later and repeat the process tomorrow.
that kid used to be called pack man, but now he is called wack-man, due to his masturbation habits in english class.
i couldnt pay attention in english class so i started pac-manning it.