How many of you out there have the misfortune to work with a nasty coworker. I work with a nasty woman with poor self esteem whose entire purpose in life is to make me miserable. She yells when she gets mad, then starts the passive aggressive behavior afterward. She acts like a 2 year old. I am at my wits end. I have managed to stay calm and not react to her nonsense but I'm just about at the end of my rope. Help!!! I need some advice on how to deal with this psycho.