It is not anyone's place to go postal at work, especially not over one word spoken to someone else on the weekend.
It is different, of course, if someone slams you up against a locker and snarls the word in your face, together with threats or ***ual remarks. There is a matter of tolerating the occasional slip, and, especially if your Employee Handbook says nothing about language and you know there is a history in your company of tolerating it, of you personally tolerating different language at the office.
If it continues, and is not a one time thing, keep it cool, speak quietly privately to the person, in polite tones, in the way you wish him to talk in your presence. Tell him that word is offensive to you and makes you uncomfortable, and you hope that you and he can work this out without you having to bring anyone else further up into the discussion.
If he does not stop speak just as calmly and politely to your supervisor. 'I find Jim's language offensive given my beliefs. Is there anything you can do to help me with this problem?'
I would NOT go to my supervisor over ONE WORD ONCE. But for a pattern and only after discussing it politely, privately, not in a public confrontation with the person where s/he is forced to react as negatively as he is approached.
Complaints to managers are like gold nuggests. Use them wisely, and use them very, very sparingly. Or things have a way of boomeranging back on you.
