Others judge you by HOW you speak. Its one thing to be among close friends and run off at the mouth, but co-workers and other non-intimate people in your life deserve better. If you ever expect to advance above flipping burgers in your career you'd better tone down the street language; it has no place in a business setting.

I'd fire your ass in a New York minute if you played that cursing music in my store (even if it was after business hours). You show some respect to your co-workers, and you'll receive some, too.