What you say if the ass kicking someone's about to get is liable to be particularly bad. (Synonymous with tear you a new one or tear you a newasshole.)
Why don't you get lost before I break my foot off in your ass.
"Shut the hell up before I shove a cactus so far up your ass you'll have more pricks in your mouth than your father had on Pride's Month," said little Jimmy "Damn, little Jimmy, you need to chill out," said his bully, getting out the gasoline and matches."
This is what will happen if you are an annoying person. It could happen when you act stupid at the bars around drunkpeople that are twice the size of you.
"If you don't shut the fuck up I'm gonna put my foot in your ass!!!"