Although definitions of bullying vary, experts generally agree that the core elements of bullying consist of unwanted, aggressive behavior among school-aged children involving a real or perceived power imbalance. There is also an element of repetition, meaning the behavior is repeated or has the potential to be repeated over time. Types of bullying include:
The Centers for Disease Control and Prevention estimates that every year between 20 and 56 percent of students in the United States are involved in bullying. Verbal bullying appears to be the most common form, followed by cyberbullying which has risen with the use of technology.
SAMHSA (Substance Abuse and Mental Health Services Administration) has more information on their website.