This question was asked to a group of Second Graders. I never gave them any explanation or prompts as to what a bully is. I just wanted to see their natural responses. Here is what they said.
A bully is:
someone who pushes you around
never leaves you alone
tells you what to do
picks on you
calls you names
says things you don't want them to
treats you badly
hurts you
takes your snack or lunch money
is mean to you
shoves
threatens you
beats you up
takes things from you
punches you
insults you
doesn't care about you or your feelings
embarrasses you in front of people
calls you nasty names
I found this to be right on target with how I was going to approach this subject. In fact, my students surprised me! They definitely know what a bully is.