flipping you marshmallow fluff

Sitting in a coffee shop (I'll admit it, it was a starbucks), I ws thinking about the phrase 'flipping you shit' 'cause I use it all the time.  Who came up with this phrase?  I find it slightly distrurbing that my favorite excuse for insulting someone or thing is that I am just 'flippin them shit.'  Was this at one time a literal term, like on a farm?  Like a bunch of cowboys being asses and flipping horse shit on some other poor cowboy and saying 'what?  i'm just flipping you shit.  calm down.'  I'd hate to have shit flipped on me.  If fact, i'd be down right pissed and I'd tackle that pissant and rub their face in said flipped shit.  But, I am always flippin people shit, and it surprises me that people take offense to me joking around.  I always state the shit flipping I am doing, like I it is okay for me to make fun of them, or that I am instantly obsolved of all insults and mean remarks.  So I asked myself what would I NOT mind being flipped with.  Marshmallow fluff.  I wouldn't care if I was flipped marshmallow fluff.  I tried it out at the starbucks, insulting the overly cheery barista boy, and following it up with 'i'm just flippin you marshmallow fluff.'  He gave me the weirdest look.  Either, way I'm not gonna win.  I probably shouldn't say anything.