Sexual bullying is when someone says or does things to make another person feel uncomfortable or unsafe in a sexual way.
For example, if someone makes fun of another person's body, touches them without asking or keeps asking them to do sexual things they don't want to do, it's considered sexual bullying.
Just like how it's not okay to call someone a mean name or hit them, it's not okay to make someone feel unsafe or uncomfortable in a sexual way. It's important to speak up and tell a trusted adult or authority figure if someone is sexually bullying you or someone you know.