A show stopper occurs when some gangster ass dude blows his load all over some dumb sluts face and then throws glitter on it.
Guy 1: "So i'm at 7/11 buying a slurpee, and this fly bitch and me started going at it. I bust my load in her face and it looks gross so I want to give it some shine, so i throw glitter on it."
Guy 2: Nice! A Showstopper!