When you know someone is taking a shit, you run in the bathroom during the shit and you yell,
"ARE YOU TAKING A SHIT?!"
and the other person will prob be like,
and you say in a high pitched voice.
then exit the bathroom.
After you complete the task completely, you are now officially a shitbuster.
*Friend Goes Into Bathroom and Sits Down To Take Shit*
*You wait 2 minutes then run into bathroom*