Cussing excessively.

Quite a few times I've found myself tempted to call someone's mouth a trash compactor. Why? Because the things coming out of their mouth on such a regular basis are disgusting.  You guys know exactly who I'm talking about.  Great example: Shia LaBeouf's character in I, Robot. I understand when angered, a person is tempted to shout some expletive, heck, even I do it, but when it becomes part of their essential vocabulary, then it's a problem. Why can't we all be like the Orbit commercials? Lets make 'Cootie Queen' the new b***h.