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Usage of "Shit-n-Shit" is similar to that of the word N shit. It is just another way to end a conversation; however, using this word it is a lot funnier, plus it implies more than just N shit. (Twice as much).

Also "Shit-n-Shit" can be used to describe: items, activities, or just about anything you can use the word shit for.
Guy 1: Hey are you busy?

Guy 2: Yeah I got a lot of stuff to do.

Guy 1: Alright, have fun with that Shit-n-shit.

Guy 1: I feel like the mafia!

Guy 2: The mafia does do Shit-n-Shit like this so it is understandable.
by AGun June 17, 2010