From the 2009 Youth Risk Behavior Surveillance System:
The next question asks about bullying. Bullying is when 1 or more students tease, threaten, spread rumors about, hit, shove, or hurt another student over and over again. It is not bullying when 2 students of about the same strength or power argue or fight or tease each other in a friendly way.
During the past 12 months, have you ever been bullied on school property?
This question was added to the national YRBS for the first time in 2009.