mcnasty shizzgrizzle
It's when you lick a clump of feces out of a girl's anus then spit it on to her breasts in a decorative fashion. Then you lick it all up and throw it back up in her anus.
"Performing a mcnasty shizzgrizzle is just M. Night Shamylan making The Village...a betrayal to all normalcy this world has ever known"