Horrible Bosses has genre Crime. Crime has examples: Action Jackson
[Human]: Do you have any movies similar to Horrible Bosses? [Assistant]: If you like Horrible Bosses because it is a comedy, then you also might like Action Jackson or Living Out Loud. [Human]: Yes, I do love comedy. Who stars in Action Jackson? [Assistant]: Thomas F. Wilson, Robert Davi, and James Lew to name a few. Action Jackson is also considered a crime movie. [Human]: Hmm, now that you mention crime, I love crime too. Can you recommend me any famous crime movie please? 
Of course. You'll probably enjoy Unleashed, The Oxford Murders, or the Ladykillers.