Steve must have been a sailor in a former life, because it's been a while since we've seen a phone dictionary come preloaded with so many US swears. The iPhone even supports multiple forms of the mother of all curses -- truly, a versatile word for a versatile phone. Now go wash your mouth out with soap, mister.
Does not support
We're sure you and your foul mouth will have plenty more words you'll want to try -- leave 'em in comments, but mind the minors, ok?