I'm one of those anachronistic journalists that cut their teeth in dirty, grimy newspaper newsrooms, where people smoked cigarettes, took a shot of Jack and swore. Yes, I have been known in the heat of deadline to unleash a few F-bombs. Yet, I've never sworn in a job interview.
A job interview is not a casual conversation between friends in bar. Instead, it is a highly formal exchange where profanity is verboten. Even if your interviewer swears, don't get comfortable and swear, too. There will be plenty of opportunities to cuss when you land the job. And if you don't.