Definition: Cyber bullying is the use of electronical devices such as pc’s and mobile phone to send imitating and threatening messages to a certain individual. Source
Here are some tips that I found on how to stop cyberbullying:
First you need to know that it is not your fault that you are being Cyberbullied.
Secondly You must know that you should tell someone and not respond or retaliate to the mean messages.
Lastly make sure to save the evidence so you have proof that it happened.
Tell the person to stop. This is completely up to you – don’t do it if you don’t feel totally comfortable doing it, because you need to make your position completely clear that you will not stand for this treatment any more. You may need to practice beforehand with someone you trust, like a parent or good friend.
Reach out for help – especially if the behavior’s really getting to you. You deserve backup. See if there’s someone who can listen, help you process what’s going on and work through it – a friend, relative or maybe an adult you trust.
Protect your accounts. Don’t share your passwords with anyone – even your closest friends, who may not be close forever – and password-protect your phone so no one can use it to impersonate you. Ensure you keep your PC up to date with the latest anti-virus software.