Plop Props are generally things like feces, slimy trash, or wadded up used toilet paper gathered for the purpose of throwing at someone you don't like. Anything that makes the sound Plop when it hits it's target is a plop prop.
I have plenty of plop props for my high school principal's house and car! He won't know what hit him, but he won't want to go home or touch his car again!
by Goyoza June 22, 2010