I definately come with a "rating M for mature language". I *can* tone it down in polite company, but if left to my own devices, I will use the S-word seven times in a sentance, in a variety of parts of speech. The S-word is my personal favourite; less shock value than the F-word, but versatle in its own right, and more fun to say.
You do have to be careful, though. We were coming back from a long road trip with a friend, and got stuck in a traffic jam. From the back of the car, my (formerly) angellic little 4-year-old daughter yelled "Get outta the way, ***holes!". O.o