A word used to describe the act of shitting on someone's chest, as popularised by the google search suggestion "what is it called when someone shits on your chest"
Sarah: Zomg, you would never believe what I found out about my disgusting boyfriend today!
Sam: What? What?
Sarah: He told me he loved to watch videos of chestcretion and hope that we could both do it!!!
Sam: EWWWWWW *faints*