If it's negatively impacting your ability to function at work or in life, then it's time to stand up, no matter how difficult it may be.
Larry shouted at me for a file. He was neither polite nor was his volume appropriate. I calmly and deliberately brought him the wrong file. He had a temper tantrum. Yup, just like a three-year-old. I let him rage and when he stopped for a breath, I calmly and firmly said, "I cannot hear what you need when you scream at me like that."
Looking to stop a bully in his tracks? Defeating a workplace bully requires a combination of wit, tactical thinking and a measure of good luck. The good news: I can help you get a "leg up" on how to interrupt and unmask a bully at large without putting your good name at risk.
If you are a victim of workplace bullying, you need to read the wisdom of Seth Godin, outlined: The way to work with a bully is to take the ball and go home. First time, every time. When there's no ball, there's no game. Bullies hate that. So they'll either behave so they can play with you or they'll go bully someone else.