Everyone knows what bullying looks like in a school setting: bullies steal lunch money, pull girls’ hair, and shove band geeks into their own lockers. But what exactly does it mean for adults to be bullied in the workplace?

No state has yet to pass legislation defining a cause of action, but 21 states have proposed laws on workplace bullying since 2003. The Workplace Bullying Institute advocates states’ passage of the Healthy Workplace Bill, drafted by Suffolk University Law School professor David Yamada.