Horrible Bosses (2011)

Three friends: Nick, Kurt and Dale with harassed, insulted, and terrorized by their bosses, devise a convoluted but foolproof plan to rid the world of their respective employers permanently. The only thing that would make the daily grind more tolerable would be to grind their intolerable bosses into dust. There's only one problem: even the best laid plans are only as foolproof as the brains behind them.