The action of tickling someone so vigorously and relentlessly that they shit themselves from laughter. It is used to humble and humiliate people who hate being tickled.
"If you don't stop singing that stupid song, I'm going to shit-tickle you."
When a girl is taking a huge dump on your chest and right after it falls onto the guy's (or girl's) neck, they begin to gentlely lick the anus of the aforementioned shitter.
Tom: Alright baby, SHIT ALL OVER ME!
Jenny: *pushing hard* Fuuuuuccckkkkkk!!!
Turd: *plop*
Tom: Are you ready for a Shit n tickle? *licks jenny's asshole*
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.