In a Nutshell: How to Deal with a Workplace Narcissist
About 0.5% of the US population has a condition called narcissistic personality disorder. Dealing with a person at work who has a God complex is annoying and tough to navigate. There are some ways to deal with your narcissistic coworker that can make your life much easier. Narcissists have no real emotions, so they'll take advantage of your being riled up and try to make you look hysterical. Don't get into an argument with someone unreasonable because you won't be able to win.
Narcissists aren't looking for a conversation- to them, everything's just an opportunity to prove that they're the greatest person ever to exist. Don't tell a narcissist anything about yourself, and don't go anywhere alone with them. Ask a friend or supervisor to be in the room with you as you and the narcissist speak. If you are forced to go somewhere alone with your narcissist, make sure that you have your cell phone with you. Do get everything in writing if you're going to be alone with him.
You'll want to print it out right away and show it to your superior. There are ways that you can avoid dealing with a difficult coworker that you might want to take a look at. When the narcissist comes near you, make it look like you're really busy to deter them from coming up and bothering you. Take breaks at different times than they do- it will do you a world of good.