In fact, the site policy on swearing is that it is a no-no, as this is not a crewroom but rather it is a public forum.
Unnecessary swearing, foul swear words, or the use of swearing to attack another person will always be frowned upon. Phrases such as you suggest above are - in my opinion - OK as it appears that that particular phrase seems to have been accepted as the "definer" of that person.
Swearing will always be considered in context and acted upon accordingly. Prepare to be surprised or "outraged" on occasion.
