20 things you should never say to your coworkers

But according to Rosalinda Oropeza Randall, an etiquette and civility expert and the author of "Don't Burp in the Boardroom," your chummy coworker relationship can become problematic when you don't keep it professional.

From things that make you sound unprofessional to awkward or impolite - and even harassing comments - there are a lot of things you shouldn't say that could turn a work relationship ugly or even get you fired.

"In conversation, use a little common sense and discretion, especially when there are others present," Randall suggests. "The general guideline is that if you wouldn't say it in front of your boss, don't say it."

Aside from the obvious - like profanity and insults - here are some words and phrases you should never utter to your coworkers: