How to respond to an arrogrant jerk mocking you/your friends?

Put yourself in his shoes, what would he hate? Ignore him, act as though he isn't there, it will be painful for you, because he won't let up initially, it may take a week or more for him to stop completely, but you must persevere! Don't speak to him, ever, no matter what, even if he offers you five dollars, you say nothing to him, but make eye contact with him, and do not break, don't look angry when you do this, look bored.