To set the terms of a deal in which one side (usually yours) is far more beneficial. It is generally dicking someone over when deciding how a deal or event will play out. Used in Bad Santa by Bernie Mac when he dicks Billy Bob & the midget out of half their loot.
"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."