Robots generally don't know how to cuss yet. In the future, however, they will be able to out-cuss weak-minded humans due to a vast, instantly accessible vocabulary and algorithms that are designed to impart maximum impact. You will be doomed in profane lyrical battles in much the same way that Garry Kasparov found himself outclassed by his metal superiors.
But until then, you can enjoy an advantage over your fellow humans by utilizing what is sure to become core-source code for the cussing modules of our future Robot Overlords. Ladies and Gentlemen, I give you The Cursinator, which is my personal contribution to the downfall of man. (You filthy, swine-colored primates.)