This term is used by jim lahey, the trailer park supervisor on trailer park boys. It is one of his many shit analogies used through out the show.
"You idiots have loaded up a hair triggered double barreled shit machine gun and it's pointed at your own heads". The rights to the quote is property of trailer park boys.
we was walkin' down the hall and Clyde here ripped a double-barreled-ass-blaster and I swear you could see the paint melt off the wall.
Also:
a fart so strong, it will make a skunk's eyes water.